Signature help for delegate types

If you’re looking at this, ready to type a lambda, how do you know what to type next?

If it’s Func<...> or Action<...> it’s easy. For two or three others, I have the signature memorized and can translate the generic types in my head to the appropriate locations (e.g. Predicate<X>). For 99% of delegate types, it’s a bunch of F12ing or F1ing every time.

Could signature help show something like this?

ParseArgument<SemanticVersion> is (ArgumentResult result) => SemanticVersion

@CyrusNajmabadi mentioned that something similar is already shown for anonymous types:

🔗 Also reported at AB#1244148

[TahirAhmadov]

Hi all, would it be feasible to auto-insert the whole signature with the “press tab” feature? When you have:

delegate void FooDelegate(string name, int age);
void Bar(FooDelegate foo) { ... }
// you type:
Bar(
// and we get this offered for "press tab" auto-complete:
Bar((name, age) => { }

[CyrusNajmabadi]

@jnm2 Consider this a green light. 😃