{
	"blocks": [
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":xero-hackathon: :xero-hackathon: :xero-hackathon: Get Ready Xeros: Hackathon is BACK! :xero-hackathon::xero-hackathon::xero-hackathon:",
				"emoji": true
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Hey Xeros! *Brisbane*\n\nOur October Hackathon kicks off next week starting on *Monday 20 to Friday 24 October*.\n\n:battery: The theme is *“Power up with AI, and unlock customer delight!”*\n\nThis Hackathon is all about powering up our customers and our Xeros through AI, innovation, and connection."
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "*Here’s what we’ve got lined up for the week:*"
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":croissant: *Hackathon Boost Lunch on Monday 20th October at 12pm*\n*Theme:* The Data Burger \nJoin us for a shared meal in the *Kitchen* to connect with fellow Hackers, recharge, and get inspired."
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":brainstorm: *Brainstorming Booths and Breakout Spaces*\nDedicated Hackathon spaces have been booked to support your collaboration and creative sessions.\n\n:teamworkhands1: *Hackathon Breakout Space* - All Hands space"
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":apple: *Snacks and Juices*\nKeep those ideas flowing with snacks and juices available in the *kitchen* to Hackathon participants all week."
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":speech_balloon: *Stay Connected*\nJoin the conversation in <https://join.slack.com/share/enQtOTY1NTEzNTcwODQ3MC1lYTI0Njg1M2MxY2ZlODE5ODdlOWNkMmI2NmY2YTViOTc2NGQ0OWQ5ZjU1ZjA2NzJkODY5NjM2ODM2NDE4OTQ0 /|*#xero-hackathon*> to stay up to date, share ideas, and see what’s happening globally."
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Let’s power up, Xeros! :zap: \nLove,\nWX :party-wx:"
			}
		}
	]
}

STEP 1: Launch Hive

Open the Terminal in Cloudera and type:

hive


You should see:

Logging initialized using configuration in /etc/hive/conf/hive-log4j.properties
Hive>

STEP 2: Create or Use a Database
SHOW DATABASES;
CREATE DATABASE IF NOT EXISTS company;
USE company;


Confirm:

SELECT current_database();

STEP 3: Create a Table

Create a simple table to hold employee data.

CREATE TABLE employees (
  id INT,
  name STRING
)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ','
TBLPROPERTIES ("skip.header.line.count"="1");

STEP 4: Create a CSV File

Exit Hive (type exit;) and in the terminal run:

cd /home/cloudera/
gedit employees.csv


Paste the data below:

id,name
101,satvik
102,rahul
103,rishi
104,nithish


Save and close the file.

STEP 5: Load Data into the Hive Table

Reopen Hive:

hive
USE company;
LOAD DATA LOCAL INPATH '/home/cloudera/employees.csv' INTO TABLE employees;


Check the data:

SELECT * FROM employees;


✅ Output:

101	satvik
102	rahul
103	rishi
104	nithish

STEP 6: Create a Hive UDF (Java File)

Exit Hive and go back to terminal.

Create a new Java file:

gedit CapitalizeUDF.java


Paste the code:

import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.Text;

public class CapitalizeUDF extends UDF {
    public Text evaluate(Text input) {
        if (input == null) return null;
        String str = input.toString().trim();
        if (str.isEmpty()) return new Text("");
        String result = str.substring(0, 1).toUpperCase() + str.substring(1).toLowerCase();
        return new Text(result);
    }
}


Save and close.

STEP 7: Compile the Java File

In the terminal:

javac -classpath $(hadoop classpath):/usr/lib/hive/lib/* -d . CapitalizeUDF.java


If successful, it won’t show any error and will create a .class file.

STEP 8: Create a JAR File
jar -cvf CapitalizeUDF.jar CapitalizeUDF.class


Check:

ls


You should see:

CapitalizeUDF.java  CapitalizeUDF.class  CapitalizeUDF.jar

STEP 9: Add JAR to Hive

Open Hive again:

hive
USE company;
ADD JAR /home/cloudera/CapitalizeUDF.jar;


You’ll get:

Added resources: /home/cloudera/CapitalizeUDF.jar

STEP 10: Create a Temporary Function
CREATE TEMPORARY FUNCTION capitalize AS 'CapitalizeUDF';

STEP 11: Use the Function
SELECT id, capitalize(name) AS capitalized_name FROM employees;

Installing kafla tgz file:
https://archive.apache.org/dist/kafka/0.8.2.2/kafka_2.10-0.8.2.2.tgz
Copy using win scp
Stop zookeeper:
sudo service zookeeper-server stop
Steps:
1. Terminal 1: Start Zookeeper
cd ~/kafka_2.10-0.8.2.2
bin/zookeeper-server-start.sh config/zookeeper.properties
2. Terminal 2: Start Kafka broker
cd ~/kafka_2.10-0.8.2.2
bin/kafka-server-start.sh config/server.properties
3. Terminal 3: Create a topic
cd ~/kafka_2.10-0.8.2.2
bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --
partitions 1 --topic events-topic
Checking if topic is created or not:
bin/kafka-topics.sh --list --zookeeper localhost:2181
4. Terminal 4: Start Kafka producer
cd ~/kafka_2.10-0.8.2.2
bin/kafka-console-producer.sh --broker-list localhost:9092 --topic events-topic
# Type messages like: hi, hello, event1
5. Terminal 5: Start Kafka consumer (optional to verify messages)
cd ~/kafka_2.10-0.8.2.2
bin/kafka-console-consumer.sh --topic events-topic --from-beginning --zookeeper
localhost:2181
6. Terminal 6: Create and run Spark Streaming subscriber
gedit spark-socket-consumer.py
spark-submit --master local[2] spark-socket-consumer.py
spark-socket-consumer.py
from pyspark import SparkConf, SparkContext
from pyspark.streaming import StreamingContext
# Setup Spark
conf =
SparkConf().setAppName("SocketKafkaForwardConsumer").setMaster("local[2]")
sc = SparkContext(conf=conf)
ssc = StreamingContext(sc, 2) # 2-second batch interval
# Listen to socket (Kafka messages will be forwarded to this socket later)
lines = ssc.socketTextStream("localhost", 9999)
def process(rdd):
 count = rdd.count()
 if count > 0:
 print("received & count: {} records in this batch".format(count))
 for i, record in enumerate(rdd.take(10)):
 print("[{}] {}".format(i, record))
 else:
 print("no records in this batch")
lines.foreachRDD(process)
ssc.start()
ssc.awaitTermination()

Common HDFS Commands

| *1. Copy file to HDFS*             | hdfs dfs -put /home/cloudera/localfile.txt /user/cloudera/   
| *2. Copy file from HDFS*           | hdfs dfs -get /user/cloudera/localfile.txt /home/cloudera/   
| *3. List directories/files*        | hdfs dfs -ls /user/cloudera/                                 
| *4. Display file contents*         | hdfs dfs -cat /user/cloudera/localfile.txt                   
| *5. Create a directory*            | hdfs dfs -mkdir /user/cloudera/newdir                         
| *6. Remove directory/file*         | hdfs dfs -rm -r /user/cloudera/newdir                         
| *7. Count number of files*         | hdfs dfs -count /user/cloudera/                               
| *8. Merge files*                   | hdfs dfs -getmerge /user/cloudera/folder/* /home/cloudera/merged.txt
| *9. Concatenate two files in HDFS* | hdfs dfs -cat /user/cloudera/file1.txt /user/cloudera/file2.txt | hdfs dfs -put - /user/cloudera/merged.txt

| *10. Find checksum*                | hdfs dfs -checksum /user/cloudera/localfile.txt               

%%configure -f
{
    "conf": {
        "spark.jars": "s3://memob-scripts/allpings/references/postgresql-42.7.7.jar"
    }
}

function custom_sp_wpspro_transient_expiration( $expiration ) {
    return 30 * MINUTE_IN_SECONDS;
}
add_filter( 'sp_wpspro_transient_expiration', 'custom_sp_wpspro_transient_expiration' );

*SAS documentation*;

//para cualquier campo usar:
'headerOptions' => ['style' => 'text-align:center;'],
'contentOptions' => ['style' => 'text-align:center; width:2%; vertical-align:middle;'],
//para casos donde el campo venga del modelo 
$columns[] = [
        'attribute' => 'nombre_proyecto',
        'label' => 'Nombre del Proyecto',
        'headerOptions' => ['style' => 'text-align:center; width:10%;text-color:white;'],
        'contentOptions' => ['style' => 'text-align:center; vertical-align:middle;'],
        'value' => function ($data) {
            // Encoded to avoid XSS, then insert line breaks cada 40 caracteres
            $name = Html::encode($data->nombre_proyecto);
            return nl2br(wordwrap($name, 40, "\n", true));
        },
        'format' => 'raw',
    ];
 // para casos donde se use la funcion listar
 'id_indicador' => [
        'attribute' => 'id_indicador',
        'label' => 'Indicador',
        'headerOptions' => ['style' => 'text-align:center;'],
        'contentOptions' => ['style' => 'text-align:center; width:2%; vertical-align:middle;'],
        'filter' => app\models\Indicadores::listAcuatico(),
        'value' => function ($data) {
            $s = app\models\Indicadores::find()->where(['id_indicador' => $data->id_indicador])->one();
            if (!$s) {
                return '';
            }
            // Encoded to avoid XSS, then insert line breaks cada 20 caracteres
            $name = Html::encode($s->nombre_indicador);
            return nl2br(wordwrap($name, 40, "\n", true));
        },
        'format' => 'raw',
    ],
   
   

[https://www.uniccm.com/course/postgraduate-professional-diploma-in-leadership-coaching-and-mentoring]

{
	"blocks": [
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":xero-hackathon: :xero-hackathon: :xero-hackathon: Get Ready Xeros: Hackathon is BACK! :xero-hackathon::xero-hackathon::xero-hackathon:",
				"emoji": true
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Hey *Melbourne* Xeros\n\nOur October Hackathon kicks off next week starting on *Monday 20 to Friday 24 October*.\n\n:battery: The theme is *“Power up with AI, and unlock customer delight!”*\n\nThis Hackathon is all about powering up our customers and our Xeros through AI, innovation, and connection."
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "*Here’s what we’ve got lined up for the week:*"
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":burger: *Hackathon Boost Lunch on Wednesday 22nd October at 12pm*\n*Theme*: Build your own Bot burger :robot:\nJoin us for a shared meal in the *Wominjeka Breakout Space* to connect with fellow Hackers, recharge, and get inspired."
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":brainstorm: *Brainstorming Booths and Breakout Spaces*\nDedicated Hackathon spaces have been booked to support your collaboration and creative sessions.*\n\n:teamworkhands1: *Hackathon Breakout Space* - Level 3 Wominjeka Breakout Space \n:bulb: *Brainstorming Booths* - Level 3 - Fitzgerald meeting room"
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":apple: *Snacks and Juices*\nKeep those ideas flowing with snacks and juices available in the *Level 3 kitchen* to Hackathon participants all week."
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": ":speech_balloon: *Stay Connected*\nJoin the conversation in <https://join.slack.com/share/enQtOTY1NTEzNTcwODQ3MC1lYTI0Njg1M2MxY2ZlODE5ODdlOWNkMmI2NmY2YTViOTc2NGQ0OWQ5ZjU1ZjA2NzJkODY5NjM2ODM2NDE4OTQ0 /|*#xero-hackathon*> to stay up to date, share ideas, and see what’s happening globally."
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Let’s power up, Xeros! :zap: \nLove,\nWX :party-wx:"
			}
		}
	]
}

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{
	"blocks": [
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":Star: :x-connect: Boost Days: What's on this week :x-connect: :Star:"
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Good morning Brisbane, \n\n See below for what's on this week!"
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":calendar-date-13: Monday, 13th October",
				"emoji": true
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "\n :meow-coffee: *Café Partnership*: Enjoy free coffee and café-style beverages from our Cafe partner *Industry Beans*.\n\n :Lunch: *Lunch*: provided from *12pm* in the kitchen.\n\n:massage:*Wellbeing*: Pilates at *SP Brisbane City* is bookable every Monday!"
			}
		},
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":calendar-date-15: Thursday, 15th October",
				"emoji": true
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "\n\n :meow-coffee: *Café Partnership*: Enjoy free coffee and café-style beverages from our Cafe partner *Industry Beans*. \n\n:lunch: *Morning Tea*: provided from *9am* in the kitchen!"
			}
		},
		{
			"type": "header",
			"text": {
				"type": "plain_text",
				"text": ":calendar-date-17: Friday, 17th October",
				"emoji": true
			}
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "\n\n :Drink: *Social*: Wind down for the week with drinks & Nibbles from *3pm-4pm*"
			}
		},
		{
			"type": "divider"
		},
		{
			"type": "section",
			"text": {
				"type": "mrkdwn",
				"text": "Stay tuned to this channel for more details, check out the <https://calendar.google.com/calendar/u/0?cid=Y19uY2M4cDN1NDRsdTdhczE0MDhvYjZhNnRjb0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t|*Brisbane Social Calendar*>, and get ready to Boost your workdays!\n\nLove,\nWX Team :party-wx:"
			}
		}
	]
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace val2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            ValidationSettings.UnobtrusiveValidationMode = UnobtrusiveValidationMode.None;
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                Label1.Text = "Valid Email and Phone";
            }
        }
    }
}


<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="val2.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            Email:
            <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
            <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtEmail" ErrorMessage="Enter a valid email" ForeColor="Red" ValidationExpression="^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$"></asp:RegularExpressionValidator>
        </div>
        Phone:
        <asp:TextBox ID="txtPhone" runat="server"></asp:TextBox>
        <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ControlToValidate="txtPhone" ErrorMessage="Enter a valid phone number" ForeColor="Red" ValidationExpression="^\d{10}$"></asp:RegularExpressionValidator>
        <p>
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" />
        </p>
        <asp:Label ID="Label1" runat="server" Text="Status"></asp:Label>
    </form>
</body>
</html>

using System;

public class Employee
{
    public string Name { get; set; }
    public int EmployeeID { get; set; }
    public double Salary { get; set; }

    public virtual void CalculateSalary() {}

    public virtual void Display()
    {
        Console.WriteLine($"Name: {Name}");
        Console.WriteLine($"Employee ID: {EmployeeID}");
        Console.WriteLine($"Salary: {Salary}");
    }
}

public class FullTimeEmployee : Employee
{
    public double BasicSalary { get; set; }
    public int NumberOfDays { get; set; }
    public double HRA { get; set; }
    public double DA { get; set; }

    public override void CalculateSalary()
    {
        Salary = (BasicSalary * NumberOfDays) + HRA + DA;
    }
}

public class PartTimeEmployee : Employee
{
    public double DailyWages { get; set; }
    public int NumberOfDays { get; set; }

    public override void CalculateSalary()
    {
        Salary = DailyWages * NumberOfDays;
    }
}

class Program
{
    static void Main()
    {
        FullTimeEmployee fte = new FullTimeEmployee
        {
            Name = "John",
            EmployeeID = 10001,
            BasicSalary = 500,
            NumberOfDays = 20,
            HRA = 1500,
            DA = 900
        };
        fte.CalculateSalary();
        Console.WriteLine("Full Time Employee Details:");
        fte.Display();
        
        Console.WriteLine();

        PartTimeEmployee pte = new PartTimeEmployee
        {
            Name = "Jane",
            EmployeeID = 20002,
            DailyWages = 300,
            NumberOfDays = 15
        };
        pte.CalculateSalary();
        Console.WriteLine("Part Time Employee Details:");
        pte.Display();

        Console.ReadLine();
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Mail;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace smtp1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                // Create the email
                MailMessage mail = new MailMessage();
                mail.To.Add(TextBox1.Text);  // Recipient email (from input)
                mail.From = new MailAddress("helloeventplanner2025@gmail.com");
                mail.Subject = TextBox2.Text; // Subject from input
                mail.Body = TextBox3.Text;    // Body from input

                // Configure SMTP
                SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
                smtp.Credentials = new System.Net.NetworkCredential(
                    "helloeventplanner2025@gmail.com",
                    "lmrpnnsvmdlhexxp" // Gmail App Password
                );
                smtp.EnableSsl = true;

                // Send email
                smtp.Send(mail);

                Label1.Text = "✅ Email sent successfully!";
            }
            catch (Exception ex)
            {
                Label1.Text = "❌ Error: " + ex.Message;
            }
        }
    }
}












<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="smtp1.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            To&nbsp;&nbsp;
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <br />
            Sub
            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
            <br />
            Body
            <asp:TextBox ID="TextBox3" runat="server" Height="129px" Width="255px"></asp:TextBox>
            <br />
            <br />
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Send" />
        </div>
        <asp:Label ID="Label1" runat="server" Text="Status"></asp:Label>
    </form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.Mail;



namespace TASK11
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                MailMessage mail = new MailMessage();
                mail.To.Add(TextBox1.Text);
                mail.From = new MailAddress("youremail@domain.com"); // Replace with your email
                mail.Subject = TextBox2.Text;
                mail.Body = TextBox3.Text;

                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com"; // Replace with your SMTP server
                smtp.Port = 587; // Replace with SMTP port
                smtp.Credentials = new System.Net.NetworkCredential("username", "password"); // Replace with your credentials
                smtp.EnableSsl = true;
                smtp.Send(mail);
                Label4.Text = "Email sent successfully!";
            }
            catch (Exception ex)
            {
                Label4.Text = "Error: " + ex.Message;
            }
        }
    }
    }

using System;


class Employee
{
    public string Name { get; set; }
    public int EmployeeID { get; set; }
    public double Salary { get; protected set; }

    public Employee(string name, int id)
    {
        Name = name;
        EmployeeID = id;
    }

    public virtual void DisplayDetails()
    {
        Console.WriteLine("Employee ID: " + EmployeeID);
        Console.WriteLine("Name: " + Name);
        Console.WriteLine("Salary: " + Salary);
    }
}


class FullTimeEmployee : Employee
{
    public double BasicSalary { get; set; }
    public int NumberOfDays { get; set; }
    public double HRA { get; set; }
    public double DA { get; set; }

    public FullTimeEmployee(string name, int id, double basicSalary, int numberOfDays, double hra, double da)
        : base(name, id)
    {
        BasicSalary = basicSalary;
        NumberOfDays = numberOfDays;
        HRA = hra;
        DA = da;
    }

    public void CalculateSalary()
    {
        Salary = (BasicSalary * NumberOfDays) + HRA + DA;
    }

    public override void DisplayDetails()
    {
        base.DisplayDetails();
        Console.WriteLine("Employee Type: Full-Time");
        Console.WriteLine("Basic Salary: " + BasicSalary);
        Console.WriteLine("Number of Days: " + NumberOfDays);
        Console.WriteLine("HRA: " + HRA);
        Console.WriteLine("DA: " + DA);
        Console.WriteLine();
    }
}


class PartTimeEmployee : Employee
{
    public double DailyWages { get; set; }
    public int NumberOfDays { get; set; }

    public PartTimeEmployee(string name, int id, double dailyWages, int numberOfDays)
        : base(name, id)
    {
        DailyWages = dailyWages;
        NumberOfDays = numberOfDays;
    }

    public void CalculateSalary()
    {
        Salary = DailyWages * NumberOfDays;
    }

    public override void DisplayDetails()
    {
        base.DisplayDetails();
        Console.WriteLine("Employee Type: Part-Time");
        Console.WriteLine("Daily Wages: " + DailyWages);
        Console.WriteLine("Number of Days: " + NumberOfDays);
        Console.WriteLine();
    }
}

class Program
{
    static void Main()
    {
        FullTimeEmployee fte = new FullTimeEmployee("Abhi", 101, 1000, 20, 500, 300);
        fte.CalculateSalary();
        fte.DisplayDetails();

        PartTimeEmployee pte = new PartTimeEmployee("Abh", 102, 500, 15);
        pte.CalculateSalary();
        pte.DisplayDetails();
    }
}

using System;
using System.Threading;
class Program
{
    public delegate int MathOperation(int a, int b);
    public static int Add(int a, int b)
    {
        Thread.Sleep(2000); 
        return a + b;
    }
    static void Main(string[] args)
    {
        Console.WriteLine("Main Started");
        MathOperation add = Add;
        Console.WriteLine("\nSynchronous call:");
        int syncResult = add(5, 3);
        Console.WriteLine($"Synchronous result: {syncResult}");
        Console.WriteLine("\nAsync call using BeginInvoke:");
        IAsyncResult asyncResult = add.BeginInvoke(20, 20, null, null);
        Console.WriteLine("Main thread continues to run...");
        int asyncResultValue = add.EndInvoke(asyncResult);
        Console.WriteLine($"Asynchronous result: {asyncResultValue}");
        Console.WriteLine("Main Ended");
    }
}

site1.master 

<!DOCTYPE html>
<html>
<head runat="server">
<title>College Info</title>
</head>
<body>
<form runat="server">
<div style="background-color:lightblue; padding:10px;">
<h1>My College</h1>
<a href="Home.aspx">Home</a> |
<a href="About.aspx">About</a>
</div>
<hr />
<asp:ContentPlaceHolder ID="MainContent" runat="server"></asp:ContentPlaceHolder>
<hr />
<footer>© 2025 My College</footer>
</form>
</body>
</html>

content pages: home
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
<h2>Welcome to My College</h2>
<p>We offer B.Tech and M.Tech courses in CSE, ECE, and ME.</p>
</asp:Content>

content page: about
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
<h2>About Our College</h2>
<p>Established in 2001, our college provides quality technical education.</p>
</asp:Content>

using System;
class Program {
    static void Main() {
        Console.Write("Enter number: ");
        int n = int.Parse(Console.ReadLine());
        int min = 9;
        while(n > 0) {
            int d = n % 10;
            if(d < min) min = d;
            n /= 10;
        }
        Console.WriteLine("Smallest digit: " + min);
    }
}

using System;
using System.Linq;
class Program {
    static void Main() {
        Console.Write("Enter string: ");
        string str = Console.ReadLine();
        var maxChar = str.GroupBy(c => c)
                         .OrderByDescending(g => g.Count())
                         .First().Key;
        Console.WriteLine("Max Occurring: " + maxChar);
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter number: ");
        int n = int.Parse(Console.ReadLine()), count = 0;
        while(n != 0) {
            int d = n % 10;
            if(d % 2 == 1) count++;
            n /= 10;
        }
        Console.WriteLine("Odd digits: " + count);
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter string: ");
        string str = Console.ReadLine();
        Console.Write("Enter start and length: ");
        int start = int.Parse(Console.ReadLine());
        int length = int.Parse(Console.ReadLine());
        string sub = str.Substring(start, length);
        Console.WriteLine("Substring: " + sub);
    }
}

using System;
using System.Text;
class Program {
    static void Main() {
        string str = "hello";
        Console.WriteLine(str.ToUpper());
        Console.WriteLine(str.Replace('l','x'));
        StringBuilder sb = new StringBuilder(str);
        sb.Append(" world");
        Console.WriteLine(sb.ToString());
        sb.Remove(0,2);
        Console.WriteLine(sb);
        sb.Insert(0, "hi ");
        Console.WriteLine(sb);
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter string: ");
        string str = Console.ReadLine();
        int count = str.Count(c => "aeiouAEIOU".Contains(c));
        Console.WriteLine("Vowels: " + count);
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter a number: ");
        int n = int.Parse(Console.ReadLine()), sum = 0;
        while(n > 0) {
            sum += n % 10;
            n /= 10;
        }
        Console.WriteLine("Sum: " + sum);
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter a number: ");
        int n = int.Parse(Console.ReadLine());
        int rev = 0;
        while(n > 0) {
            rev = rev * 10 + n % 10;
            n /= 10;
        }
        Console.WriteLine("Reversed: " + rev);
    }
}

using System;
using System.Linq;
class Program {
    static void Main() {
        Console.Write("Enter string: ");
        string str = Console.ReadLine();
        string rev = new string(str.Reverse().ToArray());
        Console.WriteLine(str == rev ? "Palindrome" : "Not palindrome");
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter terms: ");
        int n = int.Parse(Console.ReadLine());
        int a=0, b=1, c;
        for(int i = 0; i < n; i++) {
            Console.Write(a + " ");
            c = a + b;
            a = b;
            b = c;
        }
    }
}

using System;
class Program {
    static void Main() {
        Console.Write("Enter a number: ");
        int n = int.Parse(Console.ReadLine());
        bool isPrime = n > 1;
        for(int i = 2; i <= Math.Sqrt(n); i++) {
            if(n % i == 0) {
                isPrime = false; break;
            }
        }
        Console.WriteLine(isPrime ? "Prime" : "Not prime");
    }
}

Step 1: Create the ASP.NET Web Application

Open Visual Studio → Create New Project → ASP.NET Web Application (.NET Framework).

Name it: EmployeeManagementSystem.

Select Web Forms → Click Create.

Step 2: Create the Master Page

Add → New Item → Master Page → Name: Site1.Master

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="employee.Site1" %>

<!DOCTYPE html>
<html lang="en">
<head runat="server">
    <title>Employee Management System</title>
    <asp:ContentPlaceHolder ID="head" runat="server"></asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
        <!-- Header -->
        <div class="header">
            <h1>Employee Management System</h1>
            <nav>
                <a href="Default.aspx">Home</a> |
                <a href="AddEmployee.aspx">Add Employee</a> |
                <a href="ViewEmployee.aspx">View Employee</a>
            </nav>
        </div>

        <!-- Main Content -->
        <asp:ContentPlaceHolder ID="MainContent" runat="server"></asp:ContentPlaceHolder>

        <!-- Footer -->
        <div class="footer">
            <p>&copy; 2025 Employee Management System</p>
        </div>
    </form>
</body>
</html>

Step 3: Create the Home Page

Add → Web Form using Master Page → Name: Default.aspx → Select Site1.Master

<%@ Page Title="Home" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="employee.Default" %>

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
    <h2>Welcome to the Home Page</h2>
    <p>Use the menu above to navigate through the Employee Management System.</p>
</asp:Content>

Step 4: Create Add Employee Page

Add → Web Form using Master Page → Name: AddEmployee.aspx → Select Site1.Master

AddEmployee.aspx
<%@ Page Title="Add Employee" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="AddEmployee.aspx.cs" Inherits="employee.AddEmployee" %>

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
    <h2>Add Employee</h2>

    <asp:TextBox ID="empName" runat="server"></asp:TextBox><br /><br />
    <asp:TextBox ID="position" runat="server"></asp:TextBox><br /><br />
    <asp:TextBox ID="sal" runat="server"></asp:TextBox><br /><br />

    <asp:Button ID="btn" runat="server" Text="Add Employee" OnClick="btn_AddClick" /><br /><br />

    <asp:Label ID="lblMessage" runat="server" Text=""></asp:Label>
</asp:Content>

AddEmployee.aspx.cs
using System;
using System.Collections.Generic;

namespace employee
{
    public partial class AddEmployee : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                empName.Attributes["placeholder"] = "Enter employee name";
                position.Attributes["placeholder"] = "Enter employee position";
                sal.Attributes["placeholder"] = "Enter employee salary";
            }
        }

        protected void btn_AddClick(object sender, EventArgs e)
        {
            string name = empName.Text;
            string pos = position.Text;
            string salary = sal.Text;

            List<Employee> employees = Session["Employees"] as List<Employee> ?? new List<Employee>();
            employees.Add(new Employee { Name = name, Position = pos, Salary = salary });
            Session["Employees"] = employees;

            lblMessage.Text = "Employee added successfully!";

            empName.Text = position.Text = sal.Text = "";
        }
    }

    [Serializable]
    public class Employee
    {
        public string Name { get; set; }
        public string Position { get; set; }
        public string Salary { get; set; }
    }
}

Step 5: Create View Employee Page

Add → Web Form using Master Page → Name: ViewEmployee.aspx → Select Site1.Master

ViewEmployee.aspx
<%@ Page Title="View Employees" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="ViewEmployee.aspx.cs" Inherits="employee.ViewEmployee" %>

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
    <h2>All Employees</h2>
    <asp:GridView ID="gv" runat="server" AutoGenerateColumns="true"></asp:GridView>
</asp:Content>

ViewEmployee.aspx.cs
using System;
using System.Collections.Generic;

namespace employee
{
    public partial class ViewEmployee : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                List<Employee> employees = Session["Employees"] as List<Employee> ?? new List<Employee>();
                gv.DataSource = employees;
                gv.DataBind();
            }
        }
    }
}

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="userreg.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>User Registration</title>
    <style>
        .error { color: red; }
        .form-field { margin-bottom: 10px; }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <h2>Registration Form</h2>

            <div class="form-field">
                Name: 
                <asp:TextBox ID="txtName" runat="server" AutoPostBack="true" OnTextChanged="txtName_TextChanged"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvName" runat="server" 
                    ControlToValidate="txtName" ErrorMessage="Name is required" CssClass="error"></asp:RequiredFieldValidator>
            </div>

            <div class="form-field">
                Age:
                <asp:TextBox ID="txtAge" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvAge" runat="server"
                    ControlToValidate="txtAge" ErrorMessage="Age is required" CssClass="error"></asp:RequiredFieldValidator>
                <asp:RangeValidator ID="rvAge" runat="server" 
                    ControlToValidate="txtAge" MinimumValue="20" MaximumValue="30" Type="Integer" 
                    ErrorMessage="Age must be between 20 and 30" CssClass="error"></asp:RangeValidator>
            </div>

            <div class="form-field">
                Email ID:
                <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEmail" runat="server"
                    ControlToValidate="txtEmail" ErrorMessage="Email is required" CssClass="error"></asp:RequiredFieldValidator>
                <asp:RegularExpressionValidator ID="revEmail" runat="server"
                    ControlToValidate="txtEmail"
                    ErrorMessage="Invalid Email"
                    ValidationExpression="^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"
                    CssClass="error">
                </asp:RegularExpressionValidator>
            </div>

            <div class="form-field">
                User ID:
                <asp:TextBox ID="txtUserID" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvUserID" runat="server"
                    ControlToValidate="txtUserID" ErrorMessage="UserID is required" CssClass="error"></asp:RequiredFieldValidator>
                <asp:RegularExpressionValidator ID="revUserID" runat="server"
                    ControlToValidate="txtUserID"
                    ErrorMessage="UserID must contain a capital letter and a digit, 7-20 chars"
                    ValidationExpression="^(?=.*[A-Z])(?=.*\d).{7,20}$"
                    CssClass="error">
                </asp:RegularExpressionValidator>
            </div>

            <div class="form-field">
                Password:
                <asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvPassword" runat="server"
                    ControlToValidate="txtPassword" ErrorMessage="Password is required" CssClass="error"></asp:RequiredFieldValidator>
                <asp:RegularExpressionValidator ID="revPassword" runat="server"
                    ControlToValidate="txtPassword"
                    ErrorMessage="Password must be 7-20 chars"
                    ValidationExpression="^.{7,20}$"
                    CssClass="error">
                </asp:RegularExpressionValidator>
            </div>

            <div class="form-field">
                <asp:Button ID="btnSubmit" runat="server" Text="Register" OnClick="btnSubmit_Click" />
            </div>

            <asp:Label ID="lblMessage" runat="server" ForeColor="Green"></asp:Label>

        </div>
    </form>
</body>
</html>




WebForm1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace userreg
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            UnobtrusiveValidationMode = UnobtrusiveValidationMode.None;
        }

        protected void txtName_TextChanged(object sender, EventArgs e)
        {

        }

        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                lblMessage.Text = "Registration Successful!";
                // Optional: Save data to database here
            }
        }
    }
}




Steps:

1. Choose ASP.NET Web Application (.NET Framework)
2. Choose empty and Check the Web Forms
3. Right click on solution explorer and add a new item web forms and edit the codes and paste the above 2 codes
4. make sure to right click on webform1.aspx and click set as start page
5. click run

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            using (WebClient client = new WebClient())
            {
                string url = textBox1.Text;
                string filePath = @"C:\Users\Koyya\OneDrive\Desktop\example.txt";

                client.DownloadFile(url, filePath);

                MessageBox.Show("dome");


            }
        }
    }
}

========================



Steps

1. Create a new project using Windows Forms App (.NET Framework)
2.Add Controls to the Form using ToolBox

	TextBox → for entering URL (textBox1)

	Button → for DOWNLOAD (buttonDownload)

	Button → for UPLOAD (button1)

	Label → to show status (label1)


3. Double click on both the buttons and paste the above functions in those functions of respective buttons

Step - 1

=====================

Site1.Master

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="StudentApplication.Site1" %>

<!DOCTYPE html>
<html>
<head runat="server">
    <title>College Information</title>
    <link rel="stylesheet" href="style.css" />
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
        <!-- Header -->
        <header style="background-color:#f5f5f5; padding:20px; text-align:center;">
            <h1>CVR College of Engineering</h1>
        </header>

        <!-- Menu -->
        <asp:Menu ID="menu1" runat="server" Orientation="Horizontal">
            <Items>
                <asp:MenuItem NavigateUrl="~/Home.aspx" Text="HOME" Value="HOME" />
            </Items>
        </asp:Menu>

        <!-- College Image -->
        <div style="text-align:center; margin:20px;">
            <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/cur.jpg" Width="50%" />
        </div>

        <!-- Content Area -->
        <div class="content-area" style="margin:20px;">
            <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server" />
        </div>

        <!-- Footer -->
        <footer style="background-color:#eee; text-align:center; padding:15px; font-size:12px;">
            © 2025 Student Management System. All rights reserved
        </footer>
    </form>
</body>
</html>


==================

WebForm1.aspx

<%@ Page Title="Home" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="StudentApplication.WebForm1" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <h2>Welcome to CVR College of Engineering</h2>
    <p>This student management system helps in managing student records efficiently.</p>
</asp:Content>

===================


Steps:

1. Select ASP.NET Web Application(.NET Framework) with C#
2. Name it StudentApplication
3. Click Create and select empty and tick WebForms checkbox
4. Click Create
5. Right click on solution explorer and click add -> new item -> web forms master page -> add
6. Paste the above Site1.Master code in it
7. Right click on solution explorer and click add -> new item -> web forms with master page -> add -> site1.master -> ok
8. paste the above WebForm1.aspx code in it
9. Right click on WebForm1.aspx in solution explorer and click set as start page
10. Run the code


=====================

Note: If you set another name to your project, change it in the first line of Inherits attribute

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsAppFinal
{
    public partial class Form1 : Form
    {
        WebClient client = new WebClient();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                string url = textBox1.Text.Trim();
                if (string.IsNullOrEmpty(url))
                {
                    label1.Text = "Please enter a download URL.";
                    return;
                }

                string savePath = "C:\\Users\\AKHILESH\\OneDrive\\Desktop\\download.txt";


                client.DownloadFile(url, savePath);
                label1.Text = "File downloaded to " + savePath;
            }
            catch (Exception ex)
            {
                label2.Text = "Error: " + ex.Message;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                string url = textBox2.Text; // Example: https://httpbin.org/post
                string filePath = "C:\\Users\\AKHILESH\\OneDrive\\Desktop\\dummy.txt";

                client.UploadFile(url, "POST", filePath);
                MessageBox.Show("File uploaded successfully!");


                label2.Text = "Upload completed";
            }
            catch (Exception ex)
            {
                label2.Text = "Error: " + ex.Message;
            }
        }
    }

}
 
        https://raw.githubusercontent.com/vinta/awesome-python/master/README.md
https://httpbin.org/post

using System;

namespace practice
{
    public delegate int MathOperation(int x, int y);

    public class DelegateExample
    {
        public static int Add(int x, int y)
        {
            return x + y;
        }

        public static void Main()
        {
            MathOperation d = Add;
            int res = d(2, 3);
            Console.WriteLine("Result: "+res);
        }
    }
}

using System;

namespace practice
{
    interface IEmployee
    {
        void empdisplaydetails();
    }

    interface IManager : IEmployee
    {
        void Managerdetails();
    }

    class Departmentdetails : IManager
    {
        void IEmployee.empdisplaydetails()
        {
            Console.WriteLine("Employee Details");
        }

        void IManager.Managerdetails()
        {
            Console.WriteLine("Manager is working in sales department");
        }
    }

    class Program
    {
        public static void Main(string[] args)
        {
            Departmentdetails d = new Departmentdetails();

            IEmployee emp = d;
            emp.empdisplaydetails();

            IManager mg = d;
            mg.Managerdetails();
        }
    }
}

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        Console.Write("Enter an email: ");
        string email = Console.ReadLine();

        string pattern = @"^[^@\s]+@[^@\s]+\.[^@\s]+$";

        if (Regex.IsMatch(email, pattern))
            Console.WriteLine("Email is in proper format.");
        else
            Console.WriteLine("Email is NOT in proper format.");
    }
}

//Step 1: Create the Private Assembly (Class Library)

//Open Visual Studio → Create a new project → select Class Library (.NET Framework).

//Name it: MyMathLibrary.

//Replace the default class code with:

using System;

namespace MyMathLibrary
{
    public class MathOperations
    {
        public int Add(int a, int b)
        {
            return a + b;
        }

        public int Multiply(int a, int b)
        {
            return a * b;
        }
    }
}


//Build the project → This generates MyMathLibrary.dll in bin\Debug\net6.0\.

//Step 2: Create the Console Application

//Open Visual Studio → Create a new project → Console App.

//Name it: UseMyMathLibrary.

//Step 3: Add Reference via Dependencies

//In Solution Explorer, expand the console app project (UseMyMathLibrary).

//Right-click Dependencies → Add Project Reference -> Browse -> MyMathLibrary->bin->Debug->.dll

//Check MyMathLibrary → click OK


//Step 4: Use the Assembly in Your Console App
using System;
using MyMathLibrary;

class Program
{
    static void Main()
    {
        MathOperations math = new MathOperations();

        int sum = math.Add(10, 20);
        int product = math.Multiply(5, 4);

        Console.WriteLine("Sum: " + sum);
        Console.WriteLine("Product: " + product);
    }
}

using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter a number: ");
        int num = Convert.ToInt32(Console.ReadLine());

        int smallest = 9;

        while (num > 0)
        {
            int digit = num % 10;
            if (digit < smallest)
                smallest = digit;
            num /= 10;
        }

        Console.WriteLine("Smallest digit: " + smallest);
    }
}

using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter a string: ");
        string str = Console.ReadLine().ToLower();

        int[] freq = new int[256]; 

        foreach (char ch in str)
        {
            if (ch != ' ')
                freq[ch]++;
        }

        int max = 0;
        char maxChar = ' ';

        for (int i = 0; i < 256; i++)
        {
            if (freq[i] > max)
            {
                max = freq[i];
                maxChar = (char)i;
            }
        }

        Console.WriteLine("Maximum occurring character: " + maxChar);
        Console.WriteLine("Occurrences: " + max);
    }
}

//Site1.Master
 <style>
     body {
         font-family: Arial, sans-serif;
         margin: 0;
         padding: 0;
     }

     header {
         background-color: #003366;
         color: white;
         padding: 15px;
         text-align: center;
         font-size: 24px;
     }

     nav {
         background-color: #005599;
         overflow: hidden;
     }

     nav a {
         float: left;
         display: block;
         color: white;
         text-align: center;
         padding: 14px 20px;
         text-decoration: none;
     }

     nav a:hover {
         background-color: #003366;
     }

     footer {
         background-color: #003366;
         color: white;
         text-align: center;
         padding: 10px;
         position: fixed;
         bottom: 0;
         width: 100%;
     }

     .content {
         padding: 20px;
         margin-bottom: 60px; /* space for footer */
     }
 </style>

//inside form tag
 <header>
     Welcome to ABC College of Engineering
 </header>

 <nav>
     <a href="Home.aspx">Home</a>
     <a href="Aboutus.aspx">About</a>
     
     <a href="Contactus.aspx">Contact</a>
 </nav>

 <div class="content">
     <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
     </asp:ContentPlaceHolder>
 </div>

 <footer>
     &copy; 2025 ABC College | All Rights Reserved
 </footer>
//Aboutus.apsx
    <h2>About Our College</h2>
<p>Founded in 1990, ABC College of Engineering is one of the premier institutions offering quality education.</p>
<p>Our mission is to produce skilled engineers and leaders capable of addressing global challenges.</p>
//similarly Contactus.aspx

using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter a string: ");
        string str = Console.ReadLine();

        Console.Write("Enter the starting index: ");
        int start = Convert.ToInt32(Console.ReadLine());

        Console.Write("Enter the length of substring: ");
        int length = Convert.ToInt32(Console.ReadLine());

        string sub = str.Substring(start, length);

        Console.WriteLine("Extracted Substring: " + sub);
    }
}

using System;
using System.Text; // Required for StringBuilder

class Program
{
    static void Main()
    {
        // --- String Class Methods ---
        Console.WriteLine("=== String Class Methods ===");
        string str = "Hello World";

        Console.WriteLine("Original String: " + str);
        Console.WriteLine("To Upper Case: " + str.ToUpper());
        Console.WriteLine("To Lower Case: " + str.ToLower());
        Console.WriteLine("Substring (0,5): " + str.Substring(0, 5));
        Console.WriteLine("Replaced 'World' with 'C#': " + str.Replace("World", "C#"));
        Console.WriteLine("Contains 'Hello'? " + str.Contains("Hello"));
        Console.WriteLine("Length: " + str.Length);

        // --- StringBuilder Class Methods ---
        Console.WriteLine("\n=== StringBuilder Class Methods ===");
        StringBuilder sb = new StringBuilder("Hello");

        sb.Append(" World");
        Console.WriteLine("After Append: " + sb);

        sb.Insert(5, " C#");
        Console.WriteLine("After Insert: " + sb);

        sb.Replace("World", "Developers");
        Console.WriteLine("After Replace: " + sb);

        sb.Remove(5, 3);
        Console.WriteLine("After Remove: " + sb);

        sb.Clear();
        sb.Append("New String");
        Console.WriteLine("After Clear and Append: " + sb);
    }
}

using System;

class Program
{
    static void Main()
    {
        Console.Write("Enter a string: ");
        string str = Console.ReadLine().ToLower();

        int count = 0;

        foreach (char ch in str)
        {
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
            {
                count++;
            }
        }

        Console.WriteLine("Number of vowels: " + count);
    }
}

class Program
{
    static void Main()
    {
        Console.WriteLine("Enter a Number: ");
        int num = Convert.ToInt32(Console.ReadLine());

        int sum = 0;

        while (num > 0)
        {
            int digit = num % 10;
            sum += digit;
            num /= 10;
        }

        Console.WriteLine("Sum of digits: " + sum);

    }
}

class Program
{
    static void Main()
    {
        Console.WriteLine("Enter a Number: ");
        int num = Convert.ToInt32(Console.ReadLine());

        int reversed = 0;

        while (num > 0)
        {
            int digit = num % 10;
            reversed = reversed * 10 + digit;
            num /= 10;
        }

        Console.WriteLine("Reversed Num: " + reversed);

    }
}