public void ChangeWindow(MessageWindow window)
{
_windowChanging = true;
TextEditorInstance.Document.Text = window == null ? string.Empty : LocalizableString.ResolveNewLine(window.Message.Current);
TextBoxInstance.Text = window == null ? string.Empty : LocalizableString.ResolveNewLine(window.Message.Original);
TextEditorInstance.Document.UndoStack.ClearAll();
_windowChanging = false;
}