prs/prs.classes/Entities/Activity/EmployeeActivityLink.cs

using System;
using System.Linq;
using InABox.Core;

namespace Comal.Classes
{
    internal class EmployeeActivityLookup : BaseActivityLookup<Employee>
    {
        public EmployeeActivityLookup(Employee[] items) : base(items)
        {
        }

        protected override Guid EmployeeID()
        {
            return Items != null && Items.Any() ? Items.FirstOrDefault().ID : CoreUtils.FullGuid;
        }
    }

    public class EmployeeActivityLink : BaseActivityLink
    {
        [ComboLookupEditor(typeof(EmployeeActivityLookup))]
        public override Guid ID { get; set; }
    }
}