How to create a generic comboBox in WPF Property grid C#

Question

I am using property grid in a WPF project to display UI items. So basically, for properties of collection type, a comboBox is required. For this purpose I am using Extended PropertyValueEditor. The problem is that for each collection [say Languages or Operating Systems or any other collection...] I have to create a separate comboBox editor as ItemsSource is different for each. Is there any way out to create a generic comboBox and to set its ItemsSource property depending upon the collection type. (Say that a set of specific functions are there which are returning collection of languages or Operating Systems )

PS:I have a humongous number of collections to display. Any other approach too will be appreciated !!!

Please find below the sample code :

This is the editor for Operating Systems collection

public class OperatingSystemsEditor : ExtendedPropertyValueEditor
    {
        public OperatingSystemsEditor()
        {
            DataTemplate customTemplate = new DataTemplate();

            FrameworkElementFactory comboBox = new     FrameworkElementFactory(typeof (ComboBox));
            LanguageParser utilObj = new LanguageParser();

            comboBox.SetValue(ComboBox.ItemsSourceProperty, utilObj.GetOperatingSystemsAll());

            Binding selectedItem = new Binding("Value");
            comboBox.SetValue(ComboBox.SelectedItemProperty, selectedItem);
            selectedItem.Mode = BindingMode.TwoWay;

            this.InlineEditorTemplate = customTemplate;
            this.InlineEditorTemplate.VisualTree = comboBox;
        }
    }

This is the editor for Languages collection

public class LanguagesEditor : ExtendedPropertyValueEditor
    {
        public LanguagesEditor()
        {
            DataTemplate customTemplate = new DataTemplate();

            FrameworkElementFactory comboBox = new FrameworkElementFactory(typeof(ComboBox));
            LanguageParser utilObj = new LanguageParser();

            comboBox.SetValue(ComboBox.ItemsSourceProperty, utilObj.GetLanguagesAll());

            Binding selectedItems = new Binding("Value");
            comboBox.SetValue(ComboBox.SelectedItemProperty, selectedItems);
            selectedItems.Mode = BindingMode.TwoWay;

            this.InlineEditorTemplate = customTemplate;
            this.InlineEditorTemplate.VisualTree = comboBox;
        }
    }

How I am making use of these editors :

[Editor(typeof(LanguagesEditor), typeof(ExtendedPropertyValueEditor))]
public ObservableCollection<>Languages
{get; set;}

[Editor(typeof(OperatingSystemsEditor), typeof(ExtendedPropertyValueEditor))]
public ObservableCollection<> OperatingSystems
{get; set;}