anchor.diff:              x.WriteAsync (environment, buffer, 0, buffer.Length, cancel)
   
           [<Extension>]
  -        static member inline WriteAsync (environment, text) = 
  +        static member WriteAsync (environment, text) = 
               if environment = null then invalidArg "environment" "environment is required"
               if text = null then invalidArg "text" "text is required"
   
  
positive.code:                 parse formText |> populateDictionary
  
      [<Extension>]
      type x() =
  
          [<Extension>]
          static member inline Get<'a> (environment:Environment) key =
              match environment.TryGetValue(key) with
                  | true, value -> value :?> 'a
                  | _, _ -> Unchecked.defaultof<'a>
  
          [<Extension>]
          static member inline GetCallCancelled environment =
              x.Get<System.Threading.CancellationToken> environment CallCancelledKey
  
          [<Extension>]
          static member inline GetMethod environment =
              x.Get<string> environment RequestMethodKey
  
          [<Extension>]
          static member inline GetPath environment =
              x.Get<string> environment RequestPathKey
  
          [<Extension>]
          static member inline GetRequestHeaders environment = 
              x.Get<Headers> environment RequestHeadersKey
  
          [<Extension>]
          static member inline GetResponseBody environment =
              x.Get<Stream> environment ResponseBodyKey
  
          [<Extension>]
          static member inline GetResponseHeaders environment =
              x.Get<Headers> environment ResponseHeadersKey
  
          [<Extension>]
          static member inline ReadFormAsync environment : Task<Form> =
  
              let form = x.Get<Form> environment RequestFormKey
  
              let createForm =
                  async {
  
negative.code:                 | _ -> Task.FromResult form
  
          [<Extension>]
          static member WriteAsync (environment, buffer, offset, count, cancel:CancellationToken) =
              if environment = null then invalidArg "environment" "environment is required"
              if buffer = null then invalidArg "buffer" "buffer is required"
  
  