If I have a MethodInfo on a closed generic Type is there an easy way to switch those types?

Question

Let\'s say that I have the methodInfo for something like Nullable.HasValue. Is there anyway to convert it to Nullable.HasValue

Answer 1

You can do it in one line with MethodBase.GetMethodFromHandle but in order to use this method you'll have to pass typeof(List) not just typeof(string).

var methodinfo = typeof(List).GetMethod("Add");
var methodinfo2 = MethodBase.GetMethodFromHandle(methodinfo.MethodHandle,
                                                 typeof (List).TypeHandle);

Console.WriteLine(methodinfo);
Console.WriteLine(methodinfo2);

This link includes the above sample and an exlpanation of why ResolveMethod doesn't work.

https://www.re-motion.org/blogs/mix/archive/2009/08/12/trying-to-resolve-a-method-in-a-closed-generic-type.aspx