Local Functions, At It Again

I thought I got out everything during my rant about the new C# features, but apparently I missed something…

I was working on a WPF app for work and I used this to check if the code I wanted to execute could do so on the current thread (a common task in WPF development):

Action action = () =>
        // do stuff

if (Dispatcher.CurrentDispatcher.CheckAccess())

Looks good.

Well Resharper, being the passive aggressive helper that it is, suggested that I convert the action variable to a local function, which resulted in this:

void Action()
    // do stuff

if (Dispatcher.CurrentDispatcher.CheckAccess())
    Dispatcher.CurrentDispatcher.BeginInvoke((Action) Action);

Take a long look at that last line. Now, instead of creating an Action from a lambda expression, I have to cast a method to an Action. How is this better?!


2 thoughts on “Local Functions, At It Again

  1. I’m in a situation where coworkers love of Resharper has caused me to have to change up how I’ve done things. I’m not a fan of ‘var’; and unless I’m writing JavaScript, will likely never be a fan of it (despite all the pro-var arguments).

    The local functions feature seems completely ridiculous and unnecessary to me. And if a tool I was using started really pushing something like that, I’d (personally) consider shitcanning it.


  2. I think this is more down to BeginInvoke taking a Delegate rather than an Action. It’s worth noting that you can’t pass an inline lambda either without a cast, i.e. you have to do

    Dispatcher.CurrentDispatcher.BeginInvoke((Action)(() => { … }));

    If BeginInvoke took an Action then all three cases work without a cast. I tend to always use my own extension methods that take an Action when dealing with Invoke or BeginInvoke.

    Liked by 1 person

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