Looking for a WPF ComboBox with checkboxes

Question

My google skills fail me. Anyone heard of a control like that for WPF. I am trying to make it look like this (winforms screenshot).

Answer 1

There is my combobox. I use Martin Harris code and code from this link Can a WPF ComboBox display alternative text when its selection is null?

Small class for datasource:

public class SelectableObject  {
    public bool IsSelected { get; set; }
    public T ObjectData { get; set; }

    public SelectableObject(T objectData) {
        ObjectData = objectData;
    }

    public SelectableObject(T objectData, bool isSelected) {
        IsSelected = isSelected;
        ObjectData = objectData;
    }
}

And there is two handler - one for handling CheckBox clicked and one for forming Text for ComboBox.

private void OnCbObjectCheckBoxChecked(object sender, RoutedEventArgs e) {
    StringBuilder sb = new StringBuilder();
    foreach (SelectableObject cbObject in cbObjects.Items) 
    {
        if (cbObject.IsSelected)
            sb.AppendFormat("{0}, ", cbObject.ObjectData.Description);
    }
    tbObjects.Text = sb.ToString().Trim().TrimEnd(',');
}

private void OnCbObjectsSelectionChanged(object sender, SelectionChangedEventArgs e) {
    ComboBox comboBox = (ComboBox)sender;
    comboBox.SelectedItem = null;
}

For ComboBox.ItemsSource I use

ObservableCollection> 

where tblObject is type of my object, a list of which I want to display in ComboBox.

I hope this code is useful to someone!