1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
// CS0311: The type `B' cannot be used as type parameter `T' in the generic type or method `Foo<T>'. There is no implicit reference conversion from `B' to `A'
// Line: 35
using System;
public class Foo<T>
where T : A
{
public void Test (T t)
{
Console.WriteLine (t);
Console.WriteLine (t.GetType ());
t.Hello ();
}
}
public class A
{
public void Hello ()
{
Console.WriteLine ("Hello World");
}
}
public class B
{
public static implicit operator A (B b)
{
return new A ();
}
}
class X
{
Foo<B> b;
static void Main ()
{
}
}
|
