anchor.diff:          else
               None
   #endif
  +
  +    let (?) obj prop =
  +        getProperty (obj.GetType()) obj prop
   
       let (?<-) obj prop value =
   #if FX_NET_CORE_REFLECTION
  
positive.code: 
  #if FX_NO_WEBREQUEST_AUTOMATICDECOMPRESSION
      static let isWindowsPhone =
          let osVersionProp = typeof<Environment>.GetProperty("OSVersion")
          if osVersionProp <> null then
              let osVersion = osVersionProp.GetValue(null, [| |])
              if osVersion <> null then
                  let version = osVersion?Version
                  match version with
                  | Some (version:Version) ->
                      // Latest Windows is 6.x, so OS >= 8 will be Windows Phone
                      version.Major >= 8
                  | _ -> false
              else
                  false
          else
              false  
  #endif
  
      /// Appends the query parameters to the url, taking care of proper escaping
  
negative.code:         return output 
      }
  
      let getProperty (typ:Type) obj prop =
  #if FX_NET_CORE_REFLECTION
          let prop = typ.GetRuntimeProperty(prop)
          if prop <> null && prop.CanRead then
              try
                  prop.GetValue(obj) |> unbox |> Some
  