Users and group count filed in a list event receiver

i have written follwing code for event receiver on item adding of list for getting user count in person and group field added to the sharepoint list but i am not getting any result any help

using System;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;

namespace UserandGroupCountEtganAcademyProject.EventReceiver1
{
    /// <summary>
    /// List Item Events
    /// </summary>
    public class EventReceiver1 : SPItemEventReceiver
    {
        /// <summary>
        /// An item is being added.
        /// </summary>
        public override void ItemAdding(SPItemEventProperties properties)
        {
            base.ItemAdding(properties);

            var list = SPContext.Current.Web.Lists.TryGetList("Nomination");
            var item = list.Items[0];
            var userColumn = item["NominateEmployee"];
            var users = userColumn as SPFieldUserValueCollection;
            var usercolumn2 = item["NominationCount"];
            usercolumn2 = users.Count;

           String userCount = String.Format("There are {0} users or groups in select item.", users.Count);

MCTS,ITIL