ICSharpCode.AvalonEdit.TextEditor.OnIsReadOnlyChanged C# (CSharp) Method

        static void OnIsReadOnlyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            TextEditor editor = d as TextEditor;
            if (editor != null) {
                if ((bool)e.NewValue)
                    editor.TextArea.ReadOnlySectionProvider = ReadOnlyDocument.Instance;
                else
                    editor.TextArea.ReadOnlySectionProvider = NoReadOnlySections.Instance;

                TextEditorAutomationPeer peer = TextEditorAutomationPeer.FromElement(editor) as TextEditorAutomationPeer;
                if (peer != null) {
                    peer.RaiseIsReadOnlyChanged((bool)e.OldValue, (bool)e.NewValue);
                }
            }
        }