private static void Main(string[] args)
{
Console.WriteLine("Hello World!");
IDemo demo = new Demo();
demo.DemoMethod();
demo.DemoPublicDefaultMethod();
demo.DemoVirtualDefaultMethod();
demo.DemoAbstractDefaultMethod();
Console.WriteLine(demo.Message);
IDemo.DemoStaticDefaultMethod(); // Static Method
// Call method throug Class Object
Demo demo1Obj = new Demo();
// So Here you will get any method throug Object.
((IDemo)demo1Obj).DemoMethod();
//--------------------------------------------
IA demoA = new DemoC();
demoA.Display();
demoA.Display1();
IB demoB = new DemoC();
demoB.Display();
demoB.Display2();
ID dObj = new DemoD();
dObj.Display1();
dObj.Display2();
demoA = dObj;
demoA.Display();
demoB = dObj;
demoB.Display();
}