Question

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get methodinfo from a method reference C#

This is most likely something simple but so far I have not come up with anything on how to do this.

I want to be able to get the name of a method in two different ways. Please note I want a method name, not a property name.

1) Inside of a class like ClassA<T>, looking like:

var name = GetMethodName(x => x.MethodA);

2) Outside of a class, looking like:

var name = GetMethodName<ClassA<object>>(x => x.MethodA);
var name = GetMethodName<ClassB>(x => x.MethodB);

How might I do this exactly?

Thanks!

Answer 1

You don’t need lambdas (x => x.MethodA, etc). That’s just confusing the issue (and hiding the method of interest: the MethodA bit would be hidden from your GetMethodName method).

Instead, you can use reflection to get a MethodInfo object, which then has a Name property.

For example:

MethodInfo sm = typeof(SomeClass).GetMethod("SomeMethod");
string methodName = sm.Name;

Here methodName will be the string "SomeMethod". (Of course, in this simple case we’ve used the class name to get the MethodInfo object, so it’s somewhat circular and we might as well have just used the hard-coded "SomeMethod" string instead!)