隱藏基類的Set屬性

Question

我有以下代碼：

public class Ancestor
{
    public string Property {get; protected set;}
}

public class Base : Ancestor
{
    public string Property {get; set;}
}

public class Derived : Base
{
    public Derived(string message)
    {
        //I need both properties to have the message value
    }
}

祖先類和基類不是我的代碼，我無法更改它們。
有什么方法可以設置祖先的message值嗎？
顯然，僅執行以下操作是行不通的

Ancestor ancestor = this;
ancestor.Property = message

因為設置器受到保護。

Answer 1

僅通過反射：

 public class Derived : Base
{
    public Derived(string message)
    {
        Type type = typeof(Ancestor);
        Ancestor a = (Ancestor)this;
        type.GetProperty("Property").SetMethod.Invoke(a, new[] { message });
    }
}

Answer 2

我找到了滿足我需求的解決方案。 我的祖先類派生自一個接口：

public interface IAncestor
{
    string Property { get; }
}

我所做的是使用顯式接口聲明，如下所示：

public class Derived : Base, IAncestor
{
    public Derived(string message)
    {
        Property = message;
        base.Property = message;
    }
    string IAncestor.Property{get { return Property; }}
}

現在，以下測試通過：

[TestMethod]
public void ValidatePropertyIsFullyPopulated()
{
    const string expectedMessage = "hello!";
    var derived = new Derived(expectedMessage);
    Base baseClass = derived;
    IAncestor ancestor = derived;
    Assert.AreEqual(expectedMessage, derived.Property);
    Assert.AreEqual(expectedMessage, baseClass.Property);
    Assert.AreEqual(expectedMessage, ancestor.Property);

    //Notice that this Assert WILL fail because Ancestor.Property is
    //not marked as virtual.
    Ancestor ancestorClass = derived;
    //Assert.AreEqual(expectedMessage, ancestorClass.Property);
}