code: def get_msdn_ref(name):
      
      in_msdn = False
      if name in MSDN_VALUE_TYPES:
          name = MSDN_VALUE_TYPES[name]
          in_msdn = True
      if name.startswith('System.'):
          in_msdn = True
      if in_msdn:
          link = name.split('<')[0]
          if link in MSDN_LINK_MAP:
              link = MSDN_LINK_MAP[link]
          else:
              link = link.lower()
          url = 'https://msdn.microsoft.com/en-us/library/'+link+'.aspx'
          node = nodes.reference(name, shorten_type(name))
          node['refuri'] = url
          node['reftitle'] = name
          return node
      else:
          return None
docs: Try and create a reference to a type on MSDN