c# - 如何增加属性的访问修饰符

Question

我正在尝试创建一组类，其中共同的祖先负责设置各种属性所涉及的所有逻辑，而后代只是根据特定后代是否需要更改属性的访问权限。

当我尝试如下所示执行此操作时，出现编译器错误:“在覆盖‘ protected ’继承成员时无法更改访问修饰符”

有没有办法实现我想要做的事情？谢谢

public class Parent
{
     private int _propertyOne;
     private int _propertyTwo;

     protected virtual int PropertyOne
     {
          get { return _propertyOne; }
          set { _propertyOne = value; }
     }

     protected virtual int PropertyTwo
     {
          get { return _propertyTwo; }
          set { _propertyTwo = value; }
     }
}

public class ChildOne : Parent
{
    public override int PropertyOne  // Compiler Error CS0507
    {
        get { return base.PropertyOne; }
        set { base.PropertyOne = value; }
    }
    // PropertyTwo is not available to users of ChildOne
}

public class ChildTwo : Parent
{
    // PropertyOne is not available to users of ChildTwo
    public override int PropertyTwo  // Compiler Error CS0507
    {
        get { return base.PropertyTwo; }
        set { base.PropertyTwo = value; }
    }
}

Answer 1

您可以通过使用“new”而不是“override”来隐藏父级的 protected 属性，如下所示:

public class ChildOne : Parent
{
    public new int PropertyOne  // No Compiler Error
    {
        get { return base.PropertyOne; }
        set { base.PropertyOne = value; }
    }
    // PropertyTwo is not available to users of ChildOne
}

public class ChildTwo : Parent
{
    // PropertyOne is not available to users of ChildTwo
    public new int PropertyTwo
    {
        get { return base.PropertyTwo; }
        set { base.PropertyTwo = value; }
    }
}