How can I connect to Google via OAuth 2 (.net)?

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C#

VB

API

OAuth2

Hi,

i'm a little bit despaired. I try to use the google DriveApi v2 to upload a file. However i'm not able to authenticate via oAuth2. I tried nearly every pice of code that i could found. If i execute the AuthorizeAsync Function i get an exception "No Application found". What is my mistake? If it is helpful i can send you the complete Clienet Secrets that you are able to try the code at your PC.
I'm glad about every help.

Thanks in advance.

Imports System.Collections.Generic
Imports System.IO
Imports System.Threading
Imports Google.Apis.Services
Imports Google.Apis.Auth.OAuth2
Imports Google.Apis.Util.Store
Imports Google.Apis.Drive.v2

Module Program
    Sub Main()

        Dim Secrets = New ClientSecrets()
        Secrets.ClientId = "?????????????30qj3ac.apps.googleusercontent.com"
        Secrets.ClientSecret = "???????9ZFwnQBjBouF3Q_6Ja"

        Dim scope = New List(Of String)
        scope.Add(DriveService.Scope.Drive)

        Dim t As Task(Of UserCredential) = _
             GoogleWebAuthorizationBroker.AuthorizeAsync(Secrets, scope, _
             "USER", CancellationToken.None)
        Dim credential = t.Result()
    end Sub
end Module