c# - Is this instance of B a property of an instance of A? -

take @ scenario:

//base class abstract class aaa { }   //class 1 class bbb : aaa {      //field of zzz type      public zzz zfield = new zzz(); }  //class 2 class zzz {       public string foo() { return imapropertyofanaaaderivedclass ? "yes" : "no"; }        bool imapropertyofanaaaderivedclass        {           { /* here */ }       } }  //running test new bbb().zfield.foo(); // => expected "yes" new zfield.foo(); // => expected "no" 

my question is:

is there way implement imapropertyofanaaaderivedclass?

no. won;t possible in straight forward way. since zzz has not direct relation aaa. 1 possible way have public object exposed zzz , pass bbb ref , check that:

public class zzz {   public string foo() { return imapropertyofanaaaderivedclass ? "yes" : "no"; }    bool imapropertyofanaaaderivedclass    {       { return testforaaa aaa; }   }    public object testforaaa { get; set; } } 

and while using pass bbb's ref object.

of course adds dependency works!