Bindable attribute doesn't work

Question

I've extended the standard TextBox control to support padding. It works, except that the IDE does not persist the padding into the designer class.

Code:

    [EditorBrowsable(EditorBrowsableState.Always)]
    [Browsable(true)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
    [Bindable(true)]
    public new Padding Padding
    {
        get
        {
            return padding;
        }
        set
        {
            padding = value;
            OnPaddingChanged(EventArgs.Empty);
        }
    }

Strangely, if I change the property name to MyPadding or anything else, it suddenly works. What causes this problem?

Answer 1

When you shadow a base class property just to change some attributes, don't use own backing field, but base property itself, like this

[EditorBrowsable(EditorBrowsableState.Always)]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[Bindable(true)]
public new Padding Padding
{
    get { return base.Padding; }
    set { base.Padding = value; }
}

P.S. While the code above solves the persistence problem, I'm not quite sure what do you mean by "it works" because there must be a some good reason for the corresponding Control property being specifically shadowed in the TextBoxBase class in order to be hidden.