C语言怎么写下面这段用C#的代码？C语言如何定义接口和实现

namespace 任务_7._9_定义接口_C#_{ class Program { interface IFlyable { void Fly(); } interface IWalkable { void Walk(); } class Bird : IFlyable, IWalkable { public void Fly() { Console.WriteLine("小鸟在天上飞！"); } public void Walk() { Console.WriteLine("小鸟在地上走！"); } } class Dog:IWalkable { public void Walk() { Console.WriteLine("小狗在地上跑着走！"); } } static void Main(string[] args) { Bird littlebird = new Bird(); littlebird.Fly(); littlebird.Walk(); Dog littledog = new Dog(); littledog.Walk(); Console.ReadLine(); } }}