Convert SID to GUID in C#?

Question

class Program

{

static string myGuid;

static void Main(string[] args)

{

myGuid = GetGuidString("S-1-5-21-1520874019-1059933425-2350978085-6519");

Console.WriteLine(myGuid);

Console.ReadKey();

}

public static string GetGuidString(string sid)

{

return Guid.Parse(sid).ToString();

}

}