static MyPersistentBlobCache SetupCache(string cacheDirectory)
 {
     var fixture = new MyPersistentBlobCache(cacheDirectory);
     // ensuring we are working with a clear cache
     fixture.InvalidateAll();
     return fixture;
 }
        static MyPersistentBlobCache SetupCache(string cacheDirectory)
        {
            BlobCache.EnsureInitialized();

            var fixture = new MyPersistentBlobCache(cacheDirectory);

            // ensuring we are working with a clear cache
            fixture.InvalidateAll();
            return(fixture);
        }