private void detach_Files(File entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
		private void attach_Files(File entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}
 partial void DeleteFile(File instance);
 partial void UpdateFile(File instance);
 partial void InsertFile(File instance);
		private void attach_Files(File entity)
		{
			this.SendPropertyChanging();
			entity.Extension = this;
		}