东经115

摘要： public class TestEditor { private static TestEditor instance;//如果希望多线程单便应加volatile关键词 private static readonly object syncRoot = new object(); private 阅读全文

摘要： 定义接口中事件和接口参数 namespace ImplementInterfaceEvents { public interface IDrawingObject { event EventHandler ShapeChanged; } public class MyEventArgs : Even 阅读全文