Wrap text in a TextField (Microsoft.VisualStudio.Modeling.Diagrams)

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C#

DSL

I have a class that inherits from TextField that is intended to wrap the text across multiple lines.
I replace the standard TextField with it :-

protected override void InitializeShapeFields(IList<ShapeField> shapeFields)
{
    base.InitializeShapeFields(shapeFields);
    // Find the Comments decorator and make it wrapped
    TextField commentField = FindShapeField(shapeFields, FIELDNAME_DESCRIPTION) as TextField;
    shapeFields.Remove(commentField);
    // Replace with wrapped text field
    UI.Decorators.WrappedTextField   wrappedCommentField = new UI.Decorators.WrappedTextField(commentField);
    shapeFields.Add(wrappedCommentField);
}

But no wrapping occurs?

The code for WrappedTextField is:

public class WrappedTextField: TextField
{

    public WrappedTextField(TextField prototype)
        : base(prototype.Name )
    {
        // Copy the starting properties form the prototype
        DefaultText = prototype.DefaultText;
        DefaultFocusable = prototype.DefaultFocusable;
        DefaultAutoSize = false;
        DefaultMultipleLine = true;
        AnchoringBehavior.Clear();
        AnchoringBehavior.CenterHorizontally(  );
        AnchoringBehavior.CenterVertically(  );
        DefaultAccessibleState = prototype.DefaultAccessibleState;

    }

}