Question

I have a combobox with 3000 items. It takes several seconds to expand it. Is there a way to expand it faster? The items are bound using ItemsSource and a binding path:

<ComboBox ItemsSource="{Binding Path=SomeItems}" />

Answer 1

            <ComboBox>
                <ComboBox.ItemsPanel>
                    <ItemsPanelTemplate>
                        <VirtualizingStackPanel/>
                    </ItemsPanelTemplate>
                </ComboBox.ItemsPanel>
            </ComboBox>