anchor.diff:      let getCompileNodes (document:XmlDocument) =         
           [for node in document.SelectNodes(compileNodesXPath,nsmgr) -> node]
   
  +    let contentNodesXPath = "/default:Project/default:ItemGroup/default:Content"
  +    let getContentNodes (document:XmlDocument) =         
  +        [for node in document.SelectNodes(contentNodesXPath,nsmgr) -> node]
  +
       let getFileAttribute (node:XmlNode) = node.Attributes.["Include"].InnerText
   
       /// Read a Project from a FileName
  
positive.code:                 if not (includeExistsF(includePath)) then yield filePath }
      missingFiles
      |> Seq.fold (fun (project:ProjectFile) file -> project.RemoveFile(file)) project
  
  /// Removes projects Compile nodes that have Include attributes pointing to files missing from the file system.  Saves updated projects.
  let RemoveCompileNodesWithMissingFiles project =
      let newProject = removeCompileNodesWithMissingFiles System.IO.File.Exists (ProjectFile.FromFile project)
      newProject.Save()
  
  
  
           
  
negative.code: 
          new ProjectFile(projectFileName,document.OuterXml)
  
      /// Removes a file from the Content nodes
      member x.RemoveContentFile fileName =        
          let document = XMLDoc documentContent // we create a copy and work immutable
          let node = 
              getContentNodes document 
              |> List.filter (fun node -> getFileAttribute node = fileName) 
              |> Seq.last  // we remove the last one to make easier to remove duplicates
  
          node.ParentNode.RemoveChild node |> ignore
  
          new ProjectFile(projectFileName,document.OuterXml)
  
      /// All files which are in "Compile" sections
      member x.Files = getCompileNodes document |> List.map getFileAttribute
      
          /// All files which are in "Content" sections
      member x.ContentFiles = getContentNodes document |> List.map getFileAttribute
  
      /// Finds duplicate files which are in "Compile" sections
      member this.FindDuplicateFiles() = 
  