Wondering if anyone has an idea of how to use a Linq statement that iterates over a collection of nodes, splits a comma separated string UltimatePicker value, groups the split values and returns a count of each grouped valued.

The UltimatePicker values are stored as "1021,1022,1023,1024", which needs to be split then grouped.

Below is an example of grouping by year and month.

var groupedNodes =
        from p in nodes
        group p by p.GetPropertyValue("PostDate").AsDateTime().Year into yg
        orderby yg.Key descending
        select
            new
            {
                Year = yg.Key,
                Months =
                    from m in yg
                    group m by m.GetPropertyValue("PostDate").AsDateTime().Month into mg
                    select
                        new
                        {
                            Month = mg.Key,
                            Posts = mg
                        }
            };

Thank you for any help.