using System;
using System.IO;
public class FooBar
{
	public static void Main()
	{
		try	{ File.Delete("filecopy.bk");}
		catch{}
		try
		{
			File.Copy("filecopy.cs","filecopy.bk");
		}
		catch(Exception err)
		{
			Console.WriteLine(err.ToString());
			return;
		}
		try
		{
			File.Copy("filecopy.cs","filecopy.bk");
			Console.WriteLine("Filecopy did not throw an exception");
		}
		catch{}
		return;
	}
}