WinForms ComboBox DropDown and Autocomplete window both appear

Question

I\'ve got a ComboBox on a winforms app with this code:

comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
comboBox1.AutoCompleteSource         


        

Answer 1

Add a single line of code to your ComboBox KeyDown event and the problem is solved!

private void comboBox_NameAndID_KeyDown(object sender, KeyEventArgs e)
{
    comboBox_NameAndID.DroppedDown = false;
}

Source