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// Compiler options: -langversion:default
//
// Test for contravariance 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 {
string value;
public C (string name, string value)
{
this.name = "C::" + name;
this.value = value;
}
public string Value {
get {
return value;
}
}
}
public class Tester {
delegate void MethodHandler (C c1, C c2, C c3);
static void MethodSample (B b, A a, C c)
{
Console.WriteLine ("b = {0}", b.Name);
Console.WriteLine ("a = {0}", a.Name);
Console.WriteLine ("c = {0}, {1}", c.Name, c.Value);
}
public static void Main ()
{
MethodHandler mh = MethodSample;
C a = new C ("Hello", "hello");
C b = new C ("World", "world");
C c = new C ("!", "!!!");
mh (b, a, c);
}
}
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