Design Patterns.

Provider Patterns.

1. Provider pattern.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProviderPattern
{
    interface IExternalAuth_Provider
    {
        Groups AddGroup();
        Users AddUser();

    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ProviderPattern.ExternalAuthDev

{

    public class ExternalAuthDev_Provider : IExternalAuth_Provider

    {

        public Groups AddGroup()

        {

            Groups obj = new Groups { Id =1,Name = "gr1 coming from database ...." };

            Console.WriteLine("Id " + obj.Id + " Name" + obj.Name);

            return obj;

        }

        public Users AddUser()

        {

            return new Users { Id = 1, Name = "user1 coming from database ...." };

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ProviderPattern.ExternalAuthDev

{

    public class ExternalAuth_Production: IExternalAuth_Provider

    {

        public Groups AddGroup()

        {

            return new Groups { Id = 1, Name = "gr1 coming from Ad Groups...." };

        }

        public Users AddUser()

        {

            return new Users { Id = 1, Name = "user1 coming from Ad Groups...." };

        }

    }

}

using System;

using System.Collections.Generic;

using System.Configuration;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ProviderPattern

{

    public class AzureAdFactory

    {

        private static IExternalAuth_Provider DataProvider = null;

        protected AzureAdFactory()

        {

        }

       

        public static T InitProvider<T>()

        {

            string ProviderName;

            if (DataProvider == null)

            {

                // Get provider type to create

                ProviderName = "ProviderPattern.ExternalAuthDev." + ConfigurationManager.AppSettings["ProviderName"];

              //  ProviderName =   ConfigClass.ProviderName

                // Create new DataProvider

                DataProvider = (IExternalAuth_Provider)Activator.CreateInstance(Type.GetType(ProviderName));

                

            }

            return (T)DataProvider;

        }

    }

}

<appSettings>

    <!--<add key="ProviderFactory" value="AzureAdFactory"/>-->

    <add key="ProviderName" value="ExternalAuthDev_Provider"/>

  </appSettings>

  <connectionStrings>

        <add name="ExternalAuthDev_Provider"  connectionString="ProviderPattern.ExternalAuthDev.ExternalAuthDev_Provider"/>

    

  </connectionStrings>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ProviderPattern

{

    class Program

    {

        static void Main(string[] args)

        {

           

            var obj  = AzureAdFactory.InitProvider<IExternalAuth_Provider>();

            Console.WriteLine(obj.AddGroup()); 

        }

    }

}