public IDictionary <Guid, string> GetSavedUrls() { RRTracer.Trace("LocalDiskStore Looking for previously saved content."); var dic = new Dictionary <Guid, string>(); if (configuration == null || string.IsNullOrEmpty(configuration.SpritePhysicalPath)) { return(dic); } var activeFiles = FileWrapper.GetDatedFiles(configuration.SpritePhysicalPath, "*RequestReduce*"); return((from files in activeFiles where !files.FileName.Contains("-Expired-") && uriBuilder.ParseKey(files.FileName.Replace("\\", "/")) != Guid.Empty group files by uriBuilder.ParseKey(files.FileName.Replace("\\", "/")) into filegroup join files2 in activeFiles on new { k = filegroup.Key, u = filegroup.Max(m => m.CreatedDate) } equals new { k = uriBuilder.ParseKey(files2.FileName.Replace("\\", "/")), u = files2.CreatedDate } select files2.FileName) .ToDictionary(file => uriBuilder.ParseKey(file.Replace("\\", "/")), file => uriBuilder.BuildResourceUrl(uriBuilder.ParseKey(file.Replace("\\", "/")), uriBuilder.ParseSignature(file.Replace("\\", "/")), RRContainer.Current.GetAllInstances <IResourceType>(). SingleOrDefault(x => file.EndsWith(x.FileName, true, CultureInfo.InvariantCulture)).GetType()))); }