private void detach_FileDatas(FileData entity)
		{
			this.SendPropertyChanging();
			entity.X_FileData1 = null;
		}
		private void attach_FileDatas(FileData entity)
		{
			this.SendPropertyChanging();
			entity.X_FileData1 = this;
		}
 partial void UpdateFileData(FileData instance);
 partial void DeleteFileData(FileData instance);
 partial void InsertFileData(FileData instance);