sealed(C# )

• 如果类被声明为sealed封装模式，则不允许其他类来继承此类。否则会报错。

// cs_sealed_keyword.csusing System;sealed class SealedClass{    public int x;    public int y;}class MainClass{    static void Main()    {        SealedClass sc = new SealedClass();        sc.x = 110;        sc.y = 150;        Console.WriteLine("x = {0}, y = {1}", sc.x, sc.y);    }}

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• 如果你继承了sealed修饰的类。则会出现如下异常。

'MyDerivedC' cannot inherit from sealed class 'SealedClass'.