namespace PopForums.Data

{

  public class ClientLoader

  {

    public static IPopForumsData Methods()

    {

      Cache cache = HttpContext.Current.Cache;

      if (cache["IPopForumsData"] == null)

      {

        if ((ConfigurationSettings.AppSettings["PopForumsDataClass"] == null) || 

(ConfigurationSettings.AppSettings["PopForumsDataDll"] == null))

          // no data layer specified, use the internal one

          cache.Insert("IPopForumsData", typeof(PopForums.Data.Provider).Module.Assembly .GetType("PopForums.Data

SqlClient").GetConstructor(new Type[0]));



 

          else

          {

            // user has specified an external data layer

            string assemblyPath = "~\\bin\\" + ConfigurationSettings

.AppSettings["PopForumsDataDll"];

            string className = ConfigurationSettings.AppSettings["PopForumsDataClass"];

            cache.Insert("IPopForumsData", Assembly.LoadFrom(assemblyPath).GetType

(className).GetConstructor(new Type[0]));

         }

       }

       return (IPopForumsData)(  ((ConstructorInfo)cache["IPopForumsData"]).Invoke(null) );

    }

  }

}