How can I fill a combobox with a column full of position titles to filter through. Also update the combobox as new records are added

titleComboBox.DataSource = Me.JobHuntingDataSet.Position.TitleColumn
titleComboBox.Displaymember = "Title"
titleComboBox.ValueMember = "PositionID"

I'm getting an error saying Ilist could be used.

I want the PositionBindingSource.Filter = titleCombobox.SelectedText.ToString