anchor.diff:                  readResourceBytes resourceName def
                   |> Option.map (fun c ->
                       {
  +                        ResAssembly = string def.FullName
                           ResContent = null
                           ResContentBytes = c
                           ResContentType = contentType
  
positive.code:     member ri.Content =
          match ri.ResContent with
          | null ->
              let s = UTF8Encoding(false, true).GetString(ri.ResContentBytes)
              ri.ResContent <- s
              s
          | s -> s
  
      member ri.ContentType = ri.ResContentType
  
negative.code: 
  type EmbeddedFile =
      {
          ResAssembly : string
          mutable ResContent : string
          ResContentBytes : byte []
          ResContentType : string
  