Programmatically getting VS Extensibility object properties

I'm trying to use the VS extensibility API but debugger support for looking at property values is poor, so I'm working on writing code to programmatically get object properties so I can explore the API at runtime to try and work out how to do things with it.

However I've noticed something strange: when calling typeof(VSLangProj.Reference).GetProperties() I only get back those properties that I've made use of in the source code.

eg:

1)

PropertyInfo[] props = typeof(Reference).GetProperties();
int len = props.Length;

in this case, len == 0 - Reference has no properties.

2)

PropertyInfo[] props = typeof(Reference).GetProperties();
int len = props.Length;

if (false)
{
Reference r;
int bn = r.BuildNumber;
}

in this case, len == 1. Reference now has one property.

Is there a way to 'populate' types with their type info so reflection works properly?