partial void DeleteUserSkill(UserSkill instance);
 partial void UpdateUserSkill(UserSkill instance);
		private void detach_UserSkills(UserSkill entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
 partial void InsertUserSkill(UserSkill instance);
		private void attach_UserSkills(UserSkill entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}