private bool RemoveEntryCmdEnabled(RegexEntry selected)
 {
     return this.SelectedEntry != null;
 }
 private bool AddEntryCmdEnabled(RegexEntry selected)
 {
     return true;
 }
 private void RemoveEntry(RegexEntry entry)
 {
     Entries.Remove(SelectedEntry);
       SelectedEntry = null;
 }
 private void AddEntry(RegexEntry entry)
 {
     var newEntry = new RegexEntry { Name = "New Entry" };
       Entries.Add(newEntry);
       SelectedEntry = newEntry;
 }