Display 2 values in a WPF DataGridComboBoxColumn DisplayMemberPath

I have a series of objects representing some data point开发者_如何学编程s listed in a DataGridComboBoxColumn. Setting the DisplayMemeberPath property I can display a single value, say the x coordinate. What I would like to do though is display both the x and y coordinates in 'x, y' format. Any ideas on how to do this?

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you should not use DisplayMemberPath, but instead use a DataTemplate, and a TemplateColumn

    <ComboBox>
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding First}" Margin="0,0,10,0" />
                    <TextBlock Text="{Binding Second}"/>
                </StackPanel>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>