anchor.diff:      let signPath = toolsPath @@ "signtool.exe"
   
       let certToUse = match parameters.Certificate with
  -                        | Some cert -> if File.Exists cert.File then cert else parameters.DevCertificate
  +                        | Some cert -> if File.Exists cert.CertFile then cert else parameters.DevCertificate
                           | None -> parameters.DevCertificate
       
  -    let baseCall = sprintf "sign /a /f \"%s\"" certToUse.File
  +    let baseCall = sprintf "sign /a /f \"%s\"" certToUse.CertFile
   
       let withTimeStamp = baseCall + match parameters.TimeStampUrl with
                                           | Some url -> sprintf " /t \"%s\"" url.AbsoluteUri
                                           | None -> ""
   
  -    let withPassword = withTimeStamp + match certToUse.Password with
  +    let withPassword = withTimeStamp + match certToUse.PasswordFile with
                                              | Some pass -> sprintf " /p \"%s\"" (ReadLine pass)
                                              | None -> ""
   
  
positive.code: 
  /// Represents a certificate file and an optional password
  type SignCert = {
      File : string
      Password : string option
  }
  
  /// Parameters used for signing.
  
negative.code:                 info.Arguments <- withFileToSign) System.TimeSpan.MaxValue
          if result <> 0 then failwithf "Error during sign call ")
  
      traceEndTask "SignTool" "Successfully signed the specified assemblies"
  
  /// Signs all files in filesToSign with the certification file certFile, 
  /// protected with the password in the file passFile. 
  /// The signtool will be search in the toolPath.
  [<Obsolete>]
  let SignTool toolsPath certFile passFile filesToSign =
      let certToUse = {
          CertFile = certFile
          PasswordFile = passFile
      }
  
      let signParams = {
          FilesToSign = filesToSign
          Certificate = Some certToUse
          DevCertificate = certToUse
          TimeStampUrl = None
      }
  
      Sign toolsPath signParams