how to namespace used as assembly (plugin folder) for any used this function | C# Online Compiler

how to namespace used as assembly (plugin folder) for any used this function by kevat Rakesh

using System;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine("Hello World");
	}
}

 
using System;
                    
public class Program
{
    public static void Main()
    {
        Console.WriteLine("Hello World");
    }
}

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