Is it possible to look up all name alias of a given type (e.g. "int" versus "Int32")?

I've been writing unit tests to verify the validity of MVC routes. For example,

[Route("foo/bar/{id:int}")]
public IHttpActionResult SomeAction(int id)
{
   // ... 
}

would be valid but

[Route("foo/bar/{id:List<string>}")]
public IHttpActionResult SomeAction(int id)
{
   // ... 
}

or

[Route("foo/bar/{buzz:int}")]
public IHttpActionResult SomeAction(int id)
{
   // ... 
}

wouldn't.

But the problem is that I'm getting false negatives because, in the first example above, when I check that {int:id} in the route matches a parameter in the action method, the name of the type in the parameter is Int32 via reflection and I don't know how to make my test know that Int32 is the same as int. Is there a way?