user experience - WPF: Editable ComboBox; how to make search/auto-fill functionality case sensitive? -

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say have combobox, so:

<combobox iseditable="true" height="30">     <comboboxitem>robot</comboboxitem>     <comboboxitem>robot</comboboxitem> </combobox>

if user comes along , starts typing lower-case r combobox when empty, combobox predictably auto-fills word robot. great.

now same user comes along , starts typing upper-case r combobox when again empty. unpredictable, combobox auto-fills lower-case word robot. not great. desperately want auto-fill robot, wpf not seem want smile down upon me.

no matter (caps lock, shift+key), combobox auto-fill lower case robot, provided lower case robot precedes upper case robot in combobox's items collection.

is there way prevent this? behavior maddening , makes absolutely abysmal user experience.

in .net 4 can set istextsearchcasesensitive=true on combobox (or indeed itemscontrol)


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