private void detach_Studies(Study entity)
		{
			this.SendPropertyChanging();
			entity.Patient = null;
		}
		private void attach_Studies(Study entity)
		{
			this.SendPropertyChanging();
			entity.Patient = this;
		}
 partial void UpdateStudy(Study instance);
 partial void DeleteStudy(Study instance);
 partial void InsertStudy(Study instance);