c# anonymous method in a if statement?

Question

In c#, can I write something like this :

if (
     (
            try {
                ...
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
     ) == true
   )
{
...
}

without having to move all my try/catch block inside a new function

-- edit --

OK. I complete my question. (and maybe answer it a bit). What is supposed to be in the try/catch is a kind of XmlDocument.TryLoad(stream) (like there's a int.tryParse(string)). I'll need it only once so that's why I'd wanted to avoid making an extra func. So my code would be something like

            try {
                new XmlDocument().Load(foo);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }

I just want to know if it goes wrong. I don't care the reason (stream empty, bad encoding).

There are a lot of interesting answers but I think what's the more appropriate for me is to create a extension method for xmlDocument. It will be way cleaner (and reusable and easier to read) than trying to force an anonymous method in my statement

Answer 1

You can't use that exact syntax, no. You could write:

Func<bool> func = () =>
{
    // Code in here
};

if (func())
{
    ...
}

... but personally I'd extract it into a separate method. It's likely to be considerably more readable - and potentially easier to test, too.