c# - How to set focus on listbox item? -

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i have defined list box this:

var listbox = new listbox(); listbox.items.add(1);         listbox.items.add(2); listbox.items.add(3);

and want set focus directly item in listbox.

if this:

listbox.selectedindex = 0; listbox.focus();

the focus set entire listbox, if press arrow down move selection item below, have press arrow twice. first time focus jumps entire listbox first item, , when can press arrow again , selection jumps down.

i want set focus directly first item, don't have press arrow twice.

var listboxitem = (listboxitem)listbox.itemcontainergenerator.containerfromitem(listbox.selecteditem); listboxitem.focus();

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