Provider Design Patterns in NET 2.0

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.Configuration;
using System.Configuration;
using CompanyName.PhoneBook.DataAccessLayer;

namespace CompanyName.PhoneBook.DataAccessLayer
{
    public abstract class InitMember<T>
    {
        public static ProviderList Providers(string _providerSectionName)
        {
            SectionConfig qc = (SectionConfig)ConfigurationManager.GetSection(_providerSectionName);
            providerCollection = new ProviderList();
            // this wl instatiate PersonProvider with the class "personimpl" which inherit it
            ProvidersHelper.InstantiateProviders(qc.Providers, providerCollection, typeof(T));
            providerCollection.SetReadOnly();
            return providerCollection;
        }

        private static ProviderList providerCollection;
    }
}