/// <summary>/// Generates a new path for duplicate filenames./// </summary>/// <param name="path">The path.</param>/// <returns></returns>private string GetNewPathForDupes( string path ){    string directory = Path.GetDirectoryName( path );    string filename = Path.GetFileNameWithoutExtension( path );    string extension = Path.GetExtension( path );    int counter = 1;     string newFullPath;     do    {    string newFilename = "{0}({1}).{2}".FormatWith( filename, counter, extension );    newFullPath = Path.Combine( directory, newFilename );    counter++;    } while ( System.IO.File.Exists( newFullPath ) );     return newFullPath;}

源地址：http://www.oschina.net/code/snippet_4873_1460