Hi, how can I create a filter in which I want to retrieve only values of the dB for which a certain field has a null value.

the code below throws an exception at the second line. Apparently, I cannot filter like that.

IPredicateExpression filter = new PredicateExpression(ClientUnitFields.ClientId == clientId);
filter.AddWithAnd(ClientUnitFields.EndDate == null);

Any directions.

TIA

....use Dbnull.Value instead....

Thanks Dvk. That worked for me