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C abstract class

2022-04-23 03:22:00 【C ＃ primary advanced】 

// Case study 
 Case study 
 	abstract class Father
    {
        public void Eat()
        {
            Console.WriteLine(" having dinner ");
        }
        // Method statement ( Abstract method )
       // If there are abstract methods in a class , This class must be abstract 
       // Abstract methods default to virtual methods 
        public abstract  void Sleep();
    }
    class Son1: Father
    {
        public override void Sleep()
        {
            Console.WriteLine(" Molar sleep ");
        }
        
    }

        static void Main(string[] args)
        {
            Father f = new Son1();// polymorphic 
            f.Sleep();

            //Father f = new Father();
        }

    class Son2:Father
    {
        public override void Sleep()
        {
            Console.WriteLine(" Snore and sleep ");
        }
    }

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