sing System;
using System.IO;

class Test
{
    public static void Main()
    {
        string sourceFile = @"c:\tests\Test.txt";
        string newFile = @"c:\tests\Test2.txt";
        if (File.Exists(sourceFile))
        {

            File.Copy(sourceFile, newFile);

        }
        else
        {
            Console.WriteLine("Source file does not exist.");

        }
    }
}