private void detach_UserGroups(UserGroup entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
		private void attach_UserGroups(UserGroup entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}
 partial void UpdateUserGroup(UserGroup instance);
 partial void DeleteUserGroup(UserGroup instance);
 partial void InsertUserGroup(UserGroup instance);