c#.net中类的覆写(OverRide) public class MyBase { public virtual string Meth1() { return "MyBase-Meth1"; } public virtual string Meth2() { return "MyBase-Meth2"; } public virtual string Meth3() { return "MyBase-Meth3"; } } class MyDerived : MyBase { // Overrides the virtual method Meth1 using the override keyword: public override string Meth1() { return "MyDerived-Meth1"; } // Explicitly hide the virtual method Meth2 using the new // keyword: public new string Meth2() // ???这么奇怪的方式 { return "MyDerived-Meth2"; } // Because no keyword is specified in the following declaration // a warning will be issued to alert the programmer that // the method hides the inherited member MyBase.Meth3(): public string Meth3() //???同样奇怪的 { return "MyDerived-Meth3"; } public static void Main() { MyDerived mD = new MyDerived(); MyBase mB = (MyBase) mD; System.Console.WriteLine(mB.Meth1()); System.Console.WriteLine(mB.Meth2()); System.Console.WriteLine(mB.Meth3()); } } 作者Blog：http://blog.csdn.net/downmoon/
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