struck with authentication of the google analytics real time api using c#

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C#

VB

While doing the authentication we struck with FileDataStore Path. It works fine up to compiling but its get failing at run time.
For reference below is the code for this.
Autenticated.credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets { ClientId = ******, ClientSecret = ******* },
new[] { *************, AnalyticsService.Scope.AnalyticsReadonly },
**********,
CancellationToken.None,
new FileDataStore(******)).Result;

Previously i built the solution for using Google Analytics Core API (c#), By using the links - http://www.reimers.dk/jacob-reimers-blog/added-google-analytics-reader-for-net and http://www.thecyberwizard.com/index.php/5/google-analytics-api-in-c-part-1/ . But it seems to be different with above one. Please any help on creating the complete solution.