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