Preview:
using System;

namespace ConsoleApp1
{
    internal class Program
    { 
        public static void Main(string[] args)
        {
            Console.WriteLine("Enter name: ");
            string userStringInput = Console.ReadLine();
          
            Console.WriteLine(TrimUpper(userStringInput));
        }

        //Trim & toUpper()
        public static string TrimUpper(string userString) {
            string trimUpper = userString.Trim().ToUpper();
            return trimUpper;
        }
    }
}
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