List Detailed Answering Rules in C#

I think the SDK has an issue to parse the response for the "Detailed" view. I will ask the SDK team to fix that. Meanwhile, you can work around the problem with this code:

public class DetailedAnsweringRuleInfo
{
            public string uri { get; set; }
            public string id { get; set; }
            public string type { get; set; }
            public string name { get; set; }
            public bool? enabled { get; set; }
            public ScheduleInfo schedule { get; set; }
            public CalledNumberInfo[] calledNumbers { get; set; }
            public CallersInfo[] callers { get; set; }
            public string callHandlingAction { get; set; }
            public ForwardingInfo forwarding { get; set; }
            public UnconditionalForwardingInfo unconditionalForwarding { get; set; }
            public QueueInfo queue { get; set; }
            public TransferredExtensionInfo transfer { get; set; }
            public VoicemailInfo voicemail { get; set; }
            public GreetingInfo[] greetings { get; set; }
            public string screening { get; set; }
            public SharedLinesInfo sharedLines { get; set; }
            public MissedCallInfo missedCall { get; set; }
};

public class CustomUserAnsweringRuleList
{
            public string uri { get; set; }
            public DetailedAnsweringRuleInfo[] records { get; set; }
            public UserAnsweringRuleListPaging paging { get; set; }
            public UserAnsweringRuleListNavigation navigation { get; set; }
};

static private async Task list_users_answering_rule_raw()
{
    ListAnsweringRulesParameters listAnsweringRulesParams = new ListAnsweringRulesParameters{
    view = "Detailed";
    enabledOnly = false;
    };
    string endpoint = "restapi/v1.0/account/~/extension/~/answering-rule";
    var response = await rcsdk.Get(endpoint, listAnsweringRulesParams);
    var body = await response.Content.ReadAsStringAsync();            
    var result = JsonConvert.DeserializeObject<CustomUserAnsweringRuleList>(body);
            
    foreach (var record in result.records)
    {
        dynamic jsonStr = JsonConvert.SerializeObject(record);
        Console.WriteLine("=======");
        Console.WriteLine(jsonStr);
    }
}