C ＃ define and implement interface interface

1、 Defining interfaces

 interface IA
    {
        void Method1();
    }

 interface IB:IA
    {
        void Method2();
    }

 interface IFly
    {
        void Fly();
        void MethodA();
    }

2、 Implementation interface

class Bird :IFly,IB{
        public void Fly()
        {
            
        }

        public void MethodA()
        {
            
        }

        public void Method1()
        {
            
        }

        public void Method2()
        {
            
        }
    }