Make multiselect combox editable

[insomniachi]

My items source is a verily long list, and it does not make sense to scroll and find the item.
allow me to type in the combo box it'll filter the list to lesser number of values.

if this is not possible, then allow me to bind and itemsource to TagInput, to limit the items i could enter.

or AutoCompleteBox the lets me select multiple items.

[rabbitism]

Correct, there should be a combination of autocomplete and taginput. Let me think about it.