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After the code below, can you print the "resp" object as string and post it here.

var resp = await restClient.Restapi().Account().Extension().PhoneNumber().Get();

No, It is throwing CompanyPhoneNumberInfo does not contain a definition for 'for 'records'
I tried changing it to this:

CompanyPhoneNumberInfo resp = await restClient.Restapi().Account().Extension().PhoneNumber().Get();

then in the foreach I tried this:

foreach (CompanyPhoneNumberInfo record in resp.records)
{
foreach (CompanyPhoneNumberInfo feature in record.features)
{

Same exception.

I asked you to print the response, not parsing it w/o knowing what it returns.

var response = await rc.Restapi().Account().Extension().PhoneNumber().Get();
dynamic jsonStr = JsonConvert.SerializeObject(response);
Console.WriteLine(jsonStr);

The site you visit is the RingCentral Developer portal. It is different than the sandbox account admin portal. To setup and config your sandbox such as adding new users, adding new numbers ect. you need to login https://service.devtest.ringcentral.com with your sandbox user's login credentials (not the login credentials for the dev portal!). Alternatively, you can click the "Sandbox Accounts" option from the view you showed above and click on the up-arrow which will log you in the sandbox admin portal.

I will investigate the C# later.

Okay, I see it now, I will have to get the password from them, strange something has changed as I was able to use the information above to send SMS (with Python). As far as the C# goes the only error(s) I could find where in the foreach statements.

Thanks

Once you could try Python code, can you use this Python code?

https://developers.ringcentral.com/guide/messaging/quick-start#python

Thanks, I think I will try convincing them to use Python instead.

Don't need to. I just want to see the differences between using the .Net SDK and the Python SDK in your particular case.

BTW, what is the RingCentral .Net SDK version are you using?

v4.0.30319

I am not aware of a version .30319. The current version is 4.1.0. Can you update the SDK

Okay, it's now v4.0.30319

Not much luck with python either I am getting

ringcentral.http.api_exception.ApiException: Unauthorized for this grant type

you got to try with this app instead "SMSSendTest5". This app is password flow and should work with the sample code authentication.

Im really not having much luck

In python

ringcentral.http.api_exception.ApiException: In order to call this API endpoint, application needs to have [ReadAccounts] permission

Tried changing it in the C# version as well but that foreach is still jamming me up.

Then add the ReadAccounts permission to the app

Also, it look like this app "ChiliSMS" has more serious problem. It has no permissions at all.

Please go thru our dev guide and documentation to learn basic steps.

Okay,

Now it's working...I will delete ChiliSMS, not sure who put that there. Anything on that foreach statement:

foreach (var record in resp.records) I think it will work if I can get past that...

Comment out the foreach lines! Just print the response which will not have anything to do with the CompanyPhoneNumberInfo object.

I don't know why the phone-number endpoint return null from your account. It should at least return the main company number. But looking into your sandbox account, I see you don't have any other number added to the user "101".

You can login your sandbox service web, browse to the page as shown above, then click the Add Direct Number and follow the instructions to add a number to the user extension.

Test it again.

Thanks, There seems to be a problem in

static private async Task read_extension_phone_number()

here
foreach (var record in resp.records) //This throws CS1061
//CompanyPhoneNumberInfo does not contain a definition for 'records'

there are also some other problems with the record variable

Looks like your test account does not have any number. Can you check if the resp.records is null or an empty array?

Thanks, Can't tell it's telling me resp has nothing like records or features there is no definition for either one in the foreach. Anyway I looked at the account and there is a number for the account, is that it?

What is your sandbox account main company number?