public override void Update(object destObject = null)
{
var actualGroups = Model.GetGroups();
foreach (var group in AllGroups)
{
if (GroupMember.Contains(group) && !actualGroups.Contains(group.Model))
{
Model.GroupAdd(group.Model);
}
if (!GroupMember.Contains(group) && actualGroups.Contains(group.Model))
{
Model.GroupRemove(group.Model);
}
}
base.Update(destObject);
Model.Save();
}