private static void ListSecurityGroups(VpcClient client)
        {
            ListSecurityGroupsRequest req = new ListSecurityGroupsRequest
            {
                Limit = 1,
            };

            try
            {
                ListSecurityGroupsResponse resp = client.ListSecurityGroups(req);
                foreach (var securityGroup in resp.SecurityGroups)
                {
                    Console.WriteLine(securityGroup.Id);
                    Console.WriteLine(securityGroup.Name);
                }
            }
            catch (RequestTimeoutException requestTimeoutException)
            {
                Console.WriteLine(requestTimeoutException.ErrorMessage);
            }
            catch (ServiceResponseException clientRequestException)
            {
                Console.WriteLine(clientRequestException.HttpStatusCode);
                Console.WriteLine(clientRequestException.ErrorCode);
                Console.WriteLine(clientRequestException.ErrorMsg);
            }
            catch (ConnectionException connectionException)
            {
                Console.WriteLine(connectionException.ErrorMessage);
            }
        }
        public static ListSecurityGroupsResponse Unmarshall(UnmarshallerContext _ctx)
        {
            ListSecurityGroupsResponse listSecurityGroupsResponse = new ListSecurityGroupsResponse();

            listSecurityGroupsResponse.HttpResponse = _ctx.HttpResponse;
            listSecurityGroupsResponse.RequestId    = _ctx.StringValue("ListSecurityGroups.RequestId");
            listSecurityGroupsResponse.TotalCount   = _ctx.IntegerValue("ListSecurityGroups.TotalCount");

            List <string> listSecurityGroupsResponse_securityGroups = new List <string>();

            for (int i = 0; i < _ctx.Length("ListSecurityGroups.SecurityGroups.Length"); i++)
            {
                listSecurityGroupsResponse_securityGroups.Add(_ctx.StringValue("ListSecurityGroups.SecurityGroups[" + i + "]"));
            }
            listSecurityGroupsResponse.SecurityGroups = listSecurityGroupsResponse_securityGroups;

            return(listSecurityGroupsResponse);
        }