anchor.diff:  open System.Collections.Generic
   open Logging
   open ProviderImplementation.AssemblyReader.Utils.SHA1
  +open System
   
   // Needs an update so that all work is not done at once
   // computation should be done on a per group/per framework basis
  
positive.code:                 try 
                      (AssemblyDefinition.ReadAssembly path, FileInfo(path)) |> Some
                  with
                  | _ -> None
              )
              |> Seq.choose id
              |> dict
  
negative.code:                     try
                          (AssemblyDefinition.ReadAssembly (f.FullName:string), f) |> Some
                      with
                      | :? BadImageFormatException -> None)
                  |> Seq.choose id
                  |> dict
  
  