Folks,

  I have a very simple problem, I have a ComboBox bound to a datasource (ArrayList) The ArrayList does not contain an entry for a null value, but null is a perfectly valid value. I would like to know if there is anyway to have the combobox display nothing on start up. Currently it is throwing an exception.

  Yes, I could add a record with null value to the ArrayList, but is not the desired solution. I am using the ArrayList to populate a combobox in one form a datagridviewcombobox in another form. dgvcombobox handles this well with NullValue and DataSourceNullValue methods, is there something I am missing with a combobox?

Hey, you can look for null values and if you find it replace with 0 or " ".
Other exit:
try { ... } catch(/*YourExceptionOfNullValue*/)
{
//
//replace null value with value that you need.
//
}