Foreach variable in closure

Question

Using .net 4.0, why does the following code print out 'one, two, three, four, five' rather than just printing out 'five' every time?

public void Go()
{
    List<Action> printActions = new List<Action>();
    String[] strings = new[] {"one", "two", "three", "four", "five"};

    foreach (String s in strings)
        printActions.Add(() => Console.WriteLine(s));

    foreach (Action printAction in printActions)
        printAction();
}

As far as I can tell, using older versions of .net, i should be running into the problem addressed here (using foreach variable in a closure), but in this case, the code appears to work.

Answer 1

.Net 4.0 is irrelevant here. Only thing is the c# compiler. Starting from C# 5.0 behavior is changed. I presume you're using C# 5.0 compiler.

This means that even in .Net 2.0 this code will work if you're using Visual studio 2012 (given that default C# compiler version is 5.0)

If you're using Visual studio 2012 or newer version by default C#5.0 compiler will be used and hence you don't see the bug.