Well I checked up on it, and nope, there is no readonly property. I didn't try anything but a simple work around, but inefficient would be to have a OnChanged delegate called which resets the combo box items to it's previous value before the call, and then the user would not notice any difference. But this is just a temporary fix for now. You might want to create your own class derived from this and create a readonly and overload the add to not add it or whatever else you want.
Program or Be Programmed!!!
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