Working with text files

Writing to a text file

public void Writing_to_a_text_file(string message, string logfile, bool newline, bool append)
{
    // message : message to be written
    // logfile : file path
    // newline : true - finish with a new line
    // append  : true - append to file; false - start a new file
    using (var file = new System.IO.StreamWriter(logfile, append))
    {
        file.Write(message);
        if (newline)
        {
            file.WriteLine();
        }
    }
}

Create a directory

// Create a directory named "Output" next to the workbook file
string workbookDirectoryPath = 
    System.IO.Path.GetDirectoryName(Toolbox.CurrentWorkbookPath);

string outputDirectory = System.IO.Path.Combine(workbookDirectoryPath, "Output");

// Verify if directory exists, if not then create it
if (!System.IO.Directory.Exists(outputDirectory))
{
    System.IO.Directory.CreateDirectory(outputDirectory);
}