接口错误,是什么原因?
internal interface IFormView
{
abstract event UpdateCommandEventHandler UpdateCommand;
ViewController Controller { get; }
System.Windows.Forms.Form Form { get; }
IFormPanel TaskPanel { get; }
public delegate void UpdateCommandEventHandler(object sender, EventArgsViewCommand e);
}
错误:
UpdateCommandEventHandler 接口不能声明类型,应怎么改?