Question

Saw the code here. Can any one tell me what it means?

    Action wrappedAction = () => 
    { 
        threadToKill = Thread.CurrentThread; 
        action(); 
    };

Can we write such code with .net v2.0...?

Answer 1

That is a lambda expression, and is only available in C# 3.0+. The C# 2.0 version of that code looks like this:

Action wrappedAction = delegate() 
{ 
    threadToKill = Thread.CurrentThread; 
    action(); 
};

Assuming you have declared the Action delegate previously.

Answer 2

It means that wrapAction is a delegate, that takes in no parameter and that executes the following code block

  threadToKill = Thread.CurrentThread; 
  action();

It s equivalent to

public delegate void wrapActionDel(); 

public void wrapAction()
{
      threadToKill = Thread.CurrentThread; 
      action();
}

public void CallwrapAction()
{
   wrapActionDel del = wrapAction;
   del ();
}

You can see that this is verbose, but Action is not.

And, this is only available in .Net 3.5. Don t worry, your .net 2.0 code will work seamlessly with .net 3.5, so you can just upgrade.

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