Error in connection to Google API asp.net C#.

Question

Dear All,

 

I am getting a error while connecting my web application to google drive. This my C# code to connect

 

I have created a project in google drive. Then Copied the OAuth 2.0 client IDs. Then I copied the file into my D drive and given path in web application. 

 

 I have marked the error line in red color.

 

public static DriveService GetService()

{

UserCredential credential;

using (var stream = new FileStream(@"D:\client_secret.json", FileMode.Open, FileAccess.Read))

{

String FolderPath = @"D:\";

String FilePath = Path.Combine(FolderPath, "DriveServiceCredentials.json");

credential = GoogleWebAuthorizationBroker.AuthorizeAsync(GoogleClientSecrets.Load(stream).Secrets, Scopes, "bineesh", CancellationToken.None, new FileDataStore(FilePath, true)).Result;

}

//Create Drive API service.

DriveService service = new DriveService(new BaseClientService.Initializer()

{

HttpClientInitializer = credential,

ApplicationName = "GoogleDriveRestAPI-v3",

});

return service;

}

 

I have attached the error screenshot with this. Please find it and let me know how i can solve this issue.