VisualStudio intellisense and Lambdas. How can I make it not select an actual type?

I'm working on a utility class and one of my methods is defined:

void SomeMethod(Action<T> a);

The awkward thing is that in Visual Studio 2010, when you start typing:

someClass.SomeMethod(x ...

when you press the [x] key, then [space], the intellisense automatically selects whatever the first class was that started with "X", typically some "XmlWhatever" class

However, if I change my method signature to:

void SomeMethod(Expression<Action<T>> a);

Then if I start typing the same usage, pressing [x][space] puts the actual letter 'x'. It seems the intellisense handles putting in a lambda were a parameter of type Expression<> is expected, but not of type Actio开发者_如何学Pythonn<>.

Is there some way to make the VS intellisense handle the first case properly? I can't actually pass in an Expression because my intended usage is:

someClass.SomeMethod(x => x.Property1 = 123);

which leads to the error CS0832: An expression tree may not contain an assignment operator Hence I do want the Action<> to be passed in, I don't really need an Expression, it just fixes the intellisense.

It is really annoying as it is, because as I type in the Action parameters, I end up having to press [x][esc][space][=][>] to get the text "x =>", adding the "escape" keypress to close the intellisense popup. Any thoughts or ideas?

---

Edit:

OK I actually have to re-phrase my question a bit. My sample code above wasn't exactly accurate. It seems that this is the case with VS intellisense:

This IS handled correctly:

public static T SomeMethod<T>(Action<T> actions) where T : class

but this is NOT handled correctly by intellisense:

public static T IsT4<T>(params Action<T>[] actions) where T : class

So it seems intellisense doesn't like the params.

---

You can use the explicit array creation syntax to work around this problem:

obj.IsT4(new Action<SomeType>[] { x => ...

You can also create an additional overload of the IsT4 method which takes exactly 1 action delegate.

---

Tools | Options | C# | Intellisense

Uncheck 'Committed by pressing the space bar'.