/// <summary>
/// Returns a <see cref="System.String" /> that represents the message area text.
/// </summary>
/// <returns>
/// A <see cref="System.String" /> that represents this instance.
/// </returns>
public override string ToString()
{
var text = new TextRange(_rtbMessageArea.Document.ContentStart, _rtbMessageArea.Document.ContentEnd);
return text.ToString();
}