Calling DropboxOAuth2Helper.ProcessCodeFlowAsync synchronously

Hey Greg,

Normally (for asynchronous), you'd do something like this (basically changing the SimpleTest sample to allow inputing the authorization code into a text field, then converting that to an access token:

        private async void OkClick(object sender, RoutedEventArgs e)
        {
            if (this.authorizationCode.Text == String.Empty)
                this.Close();

            OAuth2Response response = await DropboxOAuth2Helper.ProcessCodeFlowAsync(authorizationCode.Text, appKey, appSecret);
            this.AccessToken = response.AccessToken;
            this.Uid = response.Uid;
            this.Result = true;
            this.Close();
        }

That works fine and is ok as long as the function, OkClick in this simple example, can can be called asynchronously. (In our real use case, C++/CLI is the caller, and it doesn't know anything about async / await).

I tried doing this instead, which seems to work for most of the Dropbox .NET API calls (note the async and await are gone, but we wait for the task to complete using task.Wait() ):

        private void OkClick(object sender, RoutedEventArgs e)
        {
            if (this.authorizationCode.Text == String.Empty)
                this.Close();

            var task = DropboxOAuth2Helper.ProcessCodeFlowAsync(authorizationCode.Text, appKey, appSecret);
            task.Wait();
            this.AccessToken = task.Result.AccessToken;
            this.Uid = task.Result.Uid;
            this.Result = true;
            this.Close();
        }

If I step through the code, I never see the line executed after task.Wait(). Am happy to send you the source too, it's basically just a modified version of SimpleTest.