Can an anonymous method in C# call itself?

Matt picture Matt · Jul 30, 2009 · Viewed 16.3k times · Source

I have the following code:

class myClass
{
private delegate string myDelegate(Object bj);

protected void method()
   {
   myDelegate build = delegate(Object bj)
                {
                    var letters= string.Empty;
                    if (someCondition)
                        return build(some_obj); //This line seems to choke the compiler
                    else string.Empty;

                };
   ......
   }
}

Is there another way to set up an anonymous method in C# such that it can call itself?

Answer

Mehrdad Afshari picture Mehrdad Afshari · Jul 30, 2009

You can break it down into two statements and use the magic of captured variables to achieve the recursion effect:

myDelegate build = null;
build = delegate(Object bj)
        {
           var letters= string.Empty;
           if (someCondition)
               return build(some_obj);                            
           else string.Empty;
        };