anchor.diff:      |> appendIfNotNull assembly "/testcontainer:"
       |> appendIfNotNull parameters.Category "/category:"
       |> appendIfNotNull testResultsFile "/resultsfile:"
  -    |> append "/noisolation"
  +    |> appendIfFalse parameters.Isolate "/noisolation"
       |> toText
   
   /// Runs MSTest command line tool on a group of assemblies.
  
positive.code:       /// Path to MSTest.exe 
        ToolPath : string
        /// Option which allow to specify if a MSTest error should break the build.
        ErrorLevel : ErrorLevel }
  
  /// MSTest default parameters.
  let MSTestDefaults = 
  
negative.code:           match tryFindFile mstestPaths mstestexe with
            | Some path -> path
            | None -> ""
        ErrorLevel = ErrorLevel.Error
        Isolate = false }
  
  /// Builds the command line arguments from the given parameter record and the given assemblies.
  /// [omit]
  