anchor.diff:  
   open NBlast.Api.Models
   open System
  +open System.Xml
  +open System.Collections
  +open System.ServiceModel.Syndication
   open System.Threading.Tasks
   open System.Net.Http.Formatting
   open System.Net.Http.Headers
  
positive.code:     override me.CanReadType tp = supportedType tp
      override me.CanWriteType tp = supportedType tp
      override me.WriteToStreamAsync(tp, value, stream, content, transportContext) =
          Task.Factory.StartNew(fun () -> 1 |> ignore)
  
negative.code: type SyndicationLogFeedFormatter() as me = 
      inherit MediaTypeFormatter() 
  
      static let syndicationTitle = ""
      static let atomMediaType = "application/atom+xml"
      static let rssMediaType  = "application/rss+xml"
  
  