/// <summary>
///
/// </summary>
/// <param name="FilePath"></param>
/// <param name="Extension"></param>
/// <returns></returns>
public static string ChangeFileExtension(this string FilePath, string Extension)
{
FileInfo fi = new FileInfo(FilePath);
string new_path = fi.ChangeFileExtension(Extension);
fi = null;
return(new_path);
}