Classes Vs Structure

Below are differences between Class & Structure
1) Class are reference type but struct are vaslue type.
2) Class are comes in inheritance but struct not.
3) A struct can't be abstract but class can.
4) One can't initialized the variable in struct.
5) Fields are automatically initialized with classes.
6) A struct can't be null.

WCF

WCF (Window Communication Foundation) is framework for building SOA based application. WCF is just like Web Service. WCF is provides the communication between client and server. It provides better security as compared to Web Services. Interoperability is the main feature of WCF. WCF is the combination of the Web Service, MSMQ, COM+ and Remoting