public static bool IsCustom(this SPClient.Feature feature)
        {
            Feature f = HelpUtil.GetFeature(feature.DefinitionId);

            if (f == null)
            {
                return(false);
            }
            else
            {
                return(f.IsCustomDefinition);
            }
        }
        public static string GetFeatureName(this SPClient.Feature feature)
        {
            Feature f = HelpUtil.GetFeature(feature.DefinitionId);

#if CLIENTSDKV150
            if (f == null)
            {
                return(string.Format("{0} (-)", feature.DefinitionId));
            }
            else
            {
                return(string.Format("{0} ({1})", f.DisplayName, f.InternalName));
            }
#elif CLIENTSDKV160UP
            return(string.Format("{0} ({1})",
                                 f == null ? feature.DefinitionId.ToString() : f.DisplayName,
                                 feature.DisplayName));
#endif
        }