Alternative to Dictionary collection

Make the key an object

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            DataTable table = new DataTable();
            table.Columns.Add("LKP_ID", typeof(int));
            table.Columns.Add("LKP_CODE", typeof(string));
            table.Columns.Add("LKP_DESC", typeof(string));

            table.Rows.Add(new object[] { 1, "FOOD", "Pasta Bake"});
            table.Rows.Add(new object[] { 2, "FOOD", "Chicken Tikka"});
            table.Rows.Add(new object[] { 3, "FOOD", "Fries"});
            table.Rows.Add(new object[] { 4, "FOOD", "Chicken Fillet Burger"});

            string colName = "LKP_ID";
            Dictionary<object, List<DataRow>> dict1 = GetDictionary(table, colName);
            colName = "LKP_CODE";
            Dictionary<object, List<DataRow>> dict2 = GetDictionary(table, colName);
        }
        static Dictionary<object, List<DataRow>> GetDictionary(DataTable table, string colName)
        {
            Dictionary<object, List<DataRow>> dict = table.AsEnumerable()
                .GroupBy(x => x.Field<object>(colName), y => y)
                .ToDictionary(x => x.Key, y => y.ToList());

            return dict;

        }

    }
}

---

jdweng