private void attach_Users(Users entity)
		{
			this.SendPropertyChanging();
			entity.History_buy = this;
		}
		private void detach_Users(Users entity)
		{
			this.SendPropertyChanging();
			entity.History_buy = null;
		}
		private void detach_Users(Users entity)
		{
			this.SendPropertyChanging();
			entity.Coach = null;
		}
		private void attach_Users(Users entity)
		{
			this.SendPropertyChanging();
			entity.Coach = this;
		}
 partial void DeleteUsers(Users instance);
 partial void UpdateUsers(Users instance);
 partial void InsertUsers(Users instance);