/// <summary>
/// Merges the contents of 2 RichTextBoxes
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
private void button4_Click(object sender, EventArgs e)
{
RTFBuilderbase sb = new RTFBuilder();
BuilderCode(sb);
this.richTextBox3.Rtf = sb.ToString();
this.richTextBox4.Rtf = sb.ToString();
sb.Clear();
sb.AppendRTFDocument(this.richTextBox3.Rtf);
sb.AppendRTFDocument(this.richTextBox4.Rtf);
this.richTextBox2.Rtf = sb.ToString();
}
