Create custom TabItem in WPF

I want to create a custom tabitem in开发者_开发技巧 my project with a treeview and stackpanel inside that Tab item. I am new to WPF. Please suggest me how this can be done.

Regards.

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<TabControl>
    <TabItem>
        <DockPanel>
            <TreeView/>
            <StackPanel />
        </DockPanel>
    </TabItem>
</TabControl>