1.C# first program "Hello World"

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 using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;


namespace helloworld.cs

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Hello World");

            Console.Read();

        }

    }

}


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