ArgumentException using Document.ReplaceText when last character is selected

Hi,

I stumbled across the following issue. I use code like this:

int SelectionStart = textBox.SelectedView.Selection.StartOffset;

int SelectionLen = textBox.SelectedView.Selection.Length;

textBox.Document.ReplaceText(DocumentModificationType.Replace, new TextRange(SelectionStart, SelectionStart + SelectionLen), textToReplace);

When the last character is selected, I get an ArgumentException.

I should also mention that the textToReplace is longer than one character (for example 10 characters) but if I select the single character before the last one, the method works just fine.

Regards,

Stefan