Derivation Constraint : Generic « Language Basics « C# / C Sharp

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C# / C Sharp » Language Basics » GenericScreenshots 
Derivation Constraint


    using System;

    public class X {

    }

    public class Y {
    }

    public class W: Y {
    }

    public class Z<K, V> where K:X where V:Y {
    }

    public class Starter{
        public static void Main(){
            // good
            Z<X, Y> obj= new Z<X, Y>();

            // good
            Z<X, W> obj2= new Z<X, W>();

            // bad
            //Z<W, Y> obj3 = new Z<W, Y>();

        }
    }

           
       
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