C#中使用“Class”[closed]

private,protected和public都是访问修饰符.他们指出哪些其他代码可以看到他们影响的代码：

public class Foo
{
    private int _myOwn = 1;
    protected int _mineAndChildren = 2;
    public int _everyOnes = 3;
}

public class Bar : Foo
{
    public void Method()
    {
        _myOwn = 2; // Illegal - can't access private member
        _mineAndChildren = 3; // Works
        _everyOnes = 4; // Works
    }
}

public class Unrelated
{
    public void Method()
    {
        Foo instance = new Foo();
        instance._myOwn = 2; // Illegal - can't access private member
        instance._mineAndChildren = 3; // Illegal
        instance._everyOnes = 4; // Works
    }
}

抽象类是可能包含抽象成员的类.抽象成员没有实现,所以派生类都必须实现抽象成员.

密封的类不能被继承.静态类被封装,但也只能包含静态成员.

我建议你从“Getting Started with Visual C#开始”.这是一个非常基本的问题.