80 lines
1.1 KiB
C#
80 lines
1.1 KiB
C#
// Compiler options: -langversion:default
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// Test for covariance support in delegates
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//
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using System;
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public class A {
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protected string name;
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public A (string name)
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{
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this.name = "A::" + name;
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}
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public A ()
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{
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}
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public string Name {
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get {
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return name;
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}
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}
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}
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public class B : A {
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public B (string name)
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{
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this.name = "B::" + name;
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}
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public B ()
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{
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}
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}
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public class C : B {
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public C (string name)
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{
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this.name = "C::" + name;
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}
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}
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public class Tester {
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delegate A MethodHandler (string name);
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static A MethodSampleA (string name)
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{
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return new A (name);
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}
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static B MethodSampleB (string name)
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{
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return new B (name);
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}
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static C MethodSampleC (string name)
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{
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return new C (name);
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}
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public static void Main ()
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{
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MethodHandler a = MethodSampleA;
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MethodHandler b = MethodSampleB;
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MethodHandler c = MethodSampleC;
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A instance1 = a ("Hello");
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A instance2 = b ("World");
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A instance3 = c ("!");
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Console.WriteLine (instance1.Name);
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Console.WriteLine (instance2.Name);
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Console.WriteLine (instance3.Name);
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}
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}
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