//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);
    }
}