Exception using content presenter
Type 'System.Windows.Controls.ContentPresenter' does not have a content property. Specify the name of the property to set, or add a ContentPropertyAttribute or TypeConverterAttribute on the type.
Below is the XAML
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding IsSelected}" Content="{Binding Series}" Width="50" VerticalAlignment="Center" Checked="CheckSeries_Checked" Unchecked="CheckSeries_UnChecked" />
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>