public void ClearGestures(Int64 UserId)
{
List<KinectGestures.GestureData> gesturesData = playerGesturesData.ContainsKey(UserId) ? playerGesturesData[UserId] : null;
if (gesturesData != null)
{
gesturesData.Clear();
playerGesturesData[UserId] = gesturesData;
}
}