Check out the errata page at www.wintellect.com - I think I remember that section having an update.
-----Original Message----- From: Yong Xu [mailto:[EMAIL PROTECTED]] Sent: Friday, May 17, 2002 1:22 PM To: [EMAIL PROTECTED] Subject: [DOTNET] 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. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
