How to pass a control as a parameter to delegate

Question

I am needing to style a ComboBoxItem for a ComboBox that is being created in code behind. Here's my code so far

ComboBox cbo1 = new ComboBox();                
cbo1.IsTextSearchEnabled = true;
cbo1.IsEditable = true;

grid1.Children.Add(cbo1); 

cbo1.Dispatcher.BeginInvoke(new StyleComboBoxItemDelegate(ref StyleComboBoxItem(cbo1), System.Windows.Threading.DispatcherPriority.Background);

public delegate void StyleComboBoxItemDelegate(ComboBox cbo_tostyle);

public void StyleComboBoxItem(ComboBox cbo_tostyle)
{
//code to style the comboboxitem;
}

I am getting the following errors

1. A ref or out argument must be an assignable variable
2. Method name expected

Please can someone help me in pointing as to what I am doing wrong?

Many Thanks

Answer 1

Try using either of these:

cbo1.Dispatcher.BeginInvoke(
    (Action)(() => StyleComboBoxItem(cbo1)), 
    System.Windows.Threading.DispatcherPriority.Background);

cbo1.Dispatcher.BeginInvoke(
    (Action)(() =>
    {
        //code to style the comboboxitem;
    }),
    System.Windows.Threading.DispatcherPriority.Background);