The following code does not provide the same output as whois.arin.net (when IP = 4.4.4.4) and throws an exception:
ArinWhois.Client.ArinClient myArinClient = new ArinWhois.Client.ArinClient();
var myWhoIsResults = myArinClient.QueryIpAsync(IP).Result;
var myWhoIsOrgResults = myArinClient.QueryResourceAsync(myWhoIsResults.Network.OrgRef.Handle, ArinWhois.Client.ArinClient.ResourceType.Organization).Result;
mywhoisorgname = myWhoIsOrgResults.Organization.Name.Value;
mywhoisorgcity = myWhoIsOrgResults.Organization.City.Value;
mywhoisorgpostalcode = myWhoIsOrgResults.Organization.PostalCode.Value;
mywhoispocrawlink = myWhoIsOrgResults.PointOfContact.Ref.Value;