/// <summary>
///
/// </summary>
/// <param name="FaceListID"></param>
/// <param name="Image"></param>
/// <param name="UserData"></param>
/// <param name="FaceRectangle"></param>
/// <returns></returns>
public static async Task <Guid> AddFaceToFaceListByFaceListID(string FaceListID, Stream Image, string UserData = null, FaceRectangle FaceRectangle = null)
{
AddPersistedFaceResult FacePersistantID = null;
FacePersistantID = await fsClient.AddFaceToFaceListAsync(FaceListID, Image, UserData, FaceRectangle);
//FacePersistantID = AsyncHelpers.RunSync(() =>
// {
// return fsClient.AddFaceToFaceListAsync(FaceListID, Image, UserData, FaceRectangle);
// });
return(FacePersistantID.PersistedFaceId);
}