C # extension method implementation

The implementation of the C # extension method can be used to implement multi-class inheritance by defining an interface method.

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceconsoleapplication12{//Defining Interfaces     Public Interfaceientity {stringID {Set;Get; } stringName {Set;Get; } }    //implementing an extension method     Public Static classIentityextentmethod { Public Static stringGetName ( Thisientity obj) {            returnObj.id +":"+obj.        Name; }    }    //implementing an Interface class     Public classdemoentity:ientity { Public stringID {Set;Get; }  Public stringName {Set;Get; } }    classProgram {Static voidMain (string[] args) {            //define an object and assign a valueDemoentity de =Newdemoentity (); De.id="001"; De. Name="Test"; //using extension methods            stringRLT =De.getname ();            Console.WriteLine (RLT);        Console.read (); }    }}

C # extension method implementation