protected override void OnDispose(bool inIsDisposing)
 {
     if (inIsDisposing)
     {
         if (_loader != null)
         {
             _loader.Release();
             _loader = null;
         }
     }
 }
        protected virtual void OnCachePluginDomainInstanceLoaderRemovedCallback(string key, object value, CacheItemRemovedReason reason)
        {
            PluginDomainInstanceLoader loader = (PluginDomainInstanceLoader)value;

            loader.Release();
        }