The Directory.Delete method deletes an empty directory from the specified path permanently. If a directory has subdirectories and/or files, you must delete them before you can delete a directory. If you try to delete a file that is not empty, you will get an error message. The following code snippet deletes the destination file.
string root = @"C:Temp";
// If directory does not exist, don't even try
if (Directory.Exists(root))
{
Directory.Delete(root);
}