anchor.diff:  
   /// Represents a file in blob storage.
   [<AbstractClass>]
  -type BlobFile internal (defaultConnectionString, container, path, getBlobRef : _ -> ICloudBlob) =
  -    let getBlobRef connectionString = getBlobRef (defaultArg connectionString defaultConnectionString, container, path)
  +type BlobFile internal (defaultConnectionString, container, file, getBlobRef : _ -> ICloudBlob) =
  +    let getBlobRef connectionString = getBlobRef (defaultArg connectionString defaultConnectionString, container, file)
       let blobProperties =
           lazy
               let blobRef = getBlobRef None
  
positive.code: 
      override this.ToString() = this.Name
  
  type BlockBlobFile internal (defaultConnectionString, container, path) =
      inherit BlobFile(defaultConnectionString, container, path, (getBlockBlobRef >> fun x -> x :> ICloudBlob))
      let getBlobRef connectionString = getBlockBlobRef(defaultArg connectionString defaultConnectionString, container, path)
  
      /// Gets a handle to the Azure SDK client for this blob.
      member __.AsCloudBlockBlob(?connectionString) = getBlobRef connectionString
  
negative.code:     /// Reads this file as a string asynchronously.
      member __.ReadAsync(?connectionString) = getBlobRef(connectionString).DownloadTextAsync() |> Async.AwaitTask
  
  type PageBlobFile internal (defaultConnectionString, container, file) =
      inherit BlobFile(defaultConnectionString, container, file, (getPageBlobRef >> fun x -> x :> ICloudBlob))
  
      /// Gets a handle to the Azure SDK client for this blob.
      member __.AsCloudPageBlob(?connectionString) = getPageBlobRef(defaultArg connectionString defaultConnectionString, container, file)
  
  /// Represents an XML file stored in blob storage.
  type XmlFile internal (defaultConnectionString, container, file) = 
      inherit BlockBlobFile(defaultConnectionString, container, file)
      
      /// Reads this file as an XDocument.
      member this.ReadAsXDocument(?connectionString) = this.Read(defaultArg connectionString defaultConnectionString) |> XDocument.Parse
  