Spreadsheets API Can not update a read-only feed - google-sheets

Question

I'm trying to add new spreadsheet if it not exists with GData Spreadsheet API for .NET but it gives me following exception:
Can not update a read-only feed
Here's my code:
var service = new SpreadsheetsService("<my-app>");
service.setUserCredentials("<login>", "<password>");
// Instantiate a SpreadsheetQuery object to retrieve spreadsheets.
SpreadsheetQuery query = new SpreadsheetQuery();
var title = "test";
query.Title = title;
// Make a request to the API and get all spreadsheets.
SpreadsheetFeed feed = service.Query(query);
if (!feed.Entries.Any())
{
var worksheet = new WorksheetEntry(20, 20, title);
service.Insert(feed, worksheet);
}
Through Fiddler I see that I'm doing request to:
GET /feeds/spreadsheets/private/full?title=test
and it goes fine, but I don't see any requests for updating data. I suppose that I should change somehow SpreadsheetQuery to make it capable to write data, but I can't find how.

Answer 1

It's me being inattentive because google documentation on Spreadsheet API says:
It is possible to create a new spreadsheet by uploading a spreadsheet
file via the Google Drive API. The Spreadsheets API does not currently
provide a way to delete a spreadsheet, but this is also provided in
the Google Drive API. For testing purposes, you may create a
spreadsheet manually or upload one.
So I basically installed GoogleDrive API with Nuget. And then added following method for adding file:
private static void AddFile(string title)
{
var clientID = "put here a clientID";
var clientSecret = "put here a clientSecret";
UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
new ClientSecrets
{
ClientId = clientID,
ClientSecret = clientSecret,
},
new[] { DriveService.Scope.Drive },
"here goes your account",
CancellationToken.None).Result;
// Create the service.
var service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "Drive API Sample",
});
var body = new Google.Apis.Drive.v2.Data.File();
body.Title = title;
//body.Description = "A test document";
body.MimeType = "application/vnd.google-apps.spreadsheet";
service.Files.Insert(body).Execute();
}
When I run code above at the first time - I received an exception that said
Could not load file or assembly
'Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.16.0
I run these in Package Manager Console:
Uninstall-Package Microsoft.Bcl.Async -Force
Install-Package Microsoft.Bcl.Async
and it worked. Hope it would help somebody who will stumble over the same issue.