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Move a file or a directory and its contents to a new location.

using System.IO;

class MoveDirectoryTest
{
	public static void Main()
	{
	// Path of the directory to be moved.
	string sourcePathOfDirectory = "C:\\Documents and Settings\\User\\MyDirectory";
	// New directory path.	
	string destinationPathOfDirectory = "D:\\MyDirectory";
	Directory.Move(sourcePathOfDirectory, destinationPathOfDirectory);
	}
}

This method throws an IOException if you try to move C:\\Documents and Settings\\User\\MyDirectory to D:\\MyDirectory, and D:\\MyDirectory already exists.