Leaking enumerable

gistfile1.cs

        DirectoryInfo info = new DirectoryInfo(@"C:\Temp");

        IEnumerable<FileInfo> files = info.EnumerateFiles("*.txt")
                                              .Where(f => f.CreationTimeUtc > lastWeek);


        foreach (FileInfo file in files)
        {

        }   // With your proposal, where does Dispose get called on the strong-typed enumerable returend by EnumerateFiles?