How to get thread Id in C#

public bool HasItemsFromPropertySet(InfoItemPropertySet propertySet, CompositeInfoItem itemRemoved)
    {
        var itemAndSubItems = new InfoItemCollection();
        if (itemRemoved != null)
        {
            itemAndSubItems.Add(itemRemoved);
            //foreach (InfoItem item in itemRemoved.AllDescendants)
            itemAndSubItems.AddRange(itemRemoved.AllDescendants);
        }
        return AllItems.AsParallel().Any(item => item.PropertySet == propertySet && !itemAndSubItems.Contains(item));
    }

Above in my code I use AsParallel().Any() How can i get thread ID of thread generated by that AsParellel.Any()...