How to load Func

Below is my factory class:

public class BulkFactory<T>
    {
        private BulkFactory() { }

        static readonly Dictionary<string, Func<T>> _dict
             = new Dictionary<string, Func<T>>();

        public static T Create(string id)
        {
            Func<T> constructor = null;
            if (_dict.TryGetValue(id, out constructor))
                return constructor();

            throw new ArgumentException("No type registered for this id");
        }

        public static void Register(string id, Func<T> ctor)
        {
            _dict.Add(id, ctor);
        }
    }

And this is how I am registering various bulk job to this factory:

BulkFactory<IBulk>.Register("LCOUPD", () => new BAT_LCOUPD<BulkLCOUpdateRecord, BAT_LCOUPD_LOG>(bulkJobCode));
BulkFactory<IBulk>.Register("STBILL", () => new BAT_STBILL<BulkStartStopBillUpdateRecord, BAT_STBILL_LOG>(bulkJobCode));
BulkFactory<IBulk>.Register("PLANCH", () => new BAT_PLANCH<BulkPlanChangeUpdateRecord, BAT_PLANCH_LOG>(bulkJobCode));
BulkFactory<IBulk>.Register("CSCORE", () => new BAT_CSCORE<BulkCSCOREUpdateRecord, BAT_CSCORE_LOG>(bulkJobCode));
BulkFactory<IBulk>.Register("CUSTAQ", () => new BAT_CUSTAQ<CustomerAcquisitionTemplate, BAT_CUSTAQ_LOG>(bulkJobCode));

In order to follow Open Closed principal I want to store all these register entries into configuration file and wanted to load it back from configuration. So that whenever I add a new bulk job I need not to modify above lines of code.

Please suggest how can I achieve this.