IDE crashes when drag inherited control with hidden property onto form

[Greg]

I've overriden the DateTimePicker control. Its been working fine so
far, but when I override the Format property to hide it from the design
time properties in the IDE, the IDE crashes when I try to put the newly
created control onto a form.

The code for the hiding of the property is:

public new DateTimePickerFormat Format
{
get
{
return this.Format;
}
set
{
this.Format = value;
}

}

Without the above code, the IDE crashes, but I still need a way of
hiding the Format property.

Any tips? I've never had to do this before, so the code above might be
very, very wrong!

Greg.