Table changes doesnt appear in combobox

I have 2 comboboxes linked with datasource , datamember proprieties with 2 tables.

In the same application I can input/delete/modify the records of the those tables.

My problem is that the combobox doesnt display the changes until I exit the application and enter again.

It must be a way to add dinamic those changes to combobox without closing the applucation

How have you loaded the data into the ComboBox? If you have bound the data then it will update automatically, which is what data-binding is for.

for each comboboxes I have an datatablebindingsource ... and it doesnt update it automatically