Add Text File in Resource and Access it in Windows Form Application

In this code add a text file to Resource then we show this text file in any where without externally copy this text file. 

private void button1_Click(object sender, EventArgs e)
{
    char[] byteArray = new char[showHelp.Properties.Resources.build_relation.Length];
    showHelp.Properties.Resources.build_relation.CopyTo(0,byteArray, 0,byteArray.Count());
    string tmpPath= Path.GetTempPath();
    StreamWriter sw = new StreamWriter(tmpPath + "\\help.txt");
    sw.Write(byteArray);
    sw.Close();
    System.Diagnostics.Process.Start(tmpPath + "\\help.txt");
}