Never mind. I tried this out as Jeffrey Richter suggested and GetType always return the same type, no matter you call it in base or derived.
Yong > -----Original Message----- > From: Yong Xu > Sent: Friday, May 17, 2002 10:28 AM > To: '[EMAIL PROTECTED]' > Subject: Implementing Equals > > Hi there, > In Jeffrey Richter's recent book, Applied .NET Framework programming, Page > 156, he demonstrated how to implement Equals for a reference type whose > base class overrides Object's Equals. He wrote this, > // let the base type compare its fields > if (!base.Equals(obj)) return false; > ... > // If the objects are of different types, they can't be equal > if (this.GetType() != obj.GetType()) return false; > ... > However, if the base class implements its Equals in the similar way, since > GetType is not virtual, then either base's (this.GetType() != > obj.GetType()) or the derived class's one must evaluate to false. Hence > the derived class's Equals will always return false. > Do I miss anything? > TIA, > Yong You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
