38 lines
620 B
C#
38 lines
620 B
C#
|
using System.Collections.Generic;
|
||
|
|
|
||
|
|
namespace Test
|
||
|
|
{
|
||
|
|
public abstract class Base
|
||
|
|
{
|
||
|
|
public virtual IEnumerable<Base> GetStuff (int a)
|
||
|
|
{
|
||
|
|
yield return this;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public abstract class Derived : Base
|
||
|
|
{
|
||
|
|
public override IEnumerable<Base> GetStuff (int a)
|
||
|
|
{
|
||
|
|
foreach (var x in base.GetStuff (a))
|
||
|
|
yield return x;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public class SpecialDerived : Derived
|
||
|
|
{
|
||
|
|
public override IEnumerable<Base> GetStuff (int a)
|
||
|
|
{
|
||
|
|
foreach (var x in base.GetStuff (a))
|
||
|
|
yield return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Main ()
|
||
|
|
{
|
||
|
|
Base b = new SpecialDerived ();
|
||
|
|
foreach (var a in b.GetStuff (5)) {
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|