Evalute Line and Fire Event including the Feedback of R

Evaluateline.cs

private SymbolicExpression EvaluateLine(String cmd)
{

    String result = "";
    // getTempfile name for sink 
    FileInfo f = new FileInfo(Path.GetTempFileName());
    SymbolicExpression s = null;
    try
    {
        // Activate sink
        this.rEngine.Evaluate(string.Format("sink(\"{0}\")", f.FullName.Replace("\\", "/")));

        // Evaluate Command and add Result to result list.
        s = rEngine.Evaluate(cmd);

    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        // End sink
        this.rEngine.Evaluate("sink()");

        // read sink-Output from tempfile
        result = File.ReadAllText(f.FullName);

        // delete tempfile
        this.rEngine.Evaluate(string.Format("unlink(\"{0}\")", f.FullName.Replace("\\", "/")));

        // fire Event
        CommandExecuted(new RExececutedEventArgs(cmd, result, s));
    }
    return s;
}