Proxy.cs

using ProxyChecker.Settings;
using System.Net;

namespace ProxyFinderAndChecker
{
    public class Proxy
    {

        public string CheckProxy(WebProxy proxy)
        {
            try
            {
                var data = "";
                using (var client = new HttpClient(handler: new HttpClientHandler() { Proxy = proxy }))
                {
                    client.Timeout = TimeSpan.FromSeconds(SettingFileConfigure.GetTimeOut());
                    data = client.GetStringAsync("http://ip-api.com/json").GetAwaiter().GetResult();
                }
                return data;
            }
            catch
            {
                return "Error";
            }
        }
    }


    public class CheckedProxyData
    {
        public string status { get; set; }
        public string country { get; set; }
        public string countryCode { get; set; }
        public string region { get; set; }
        public string regionName { get; set; }
        public string city { get; set; }
        public string zip { get; set; }
        public double lat { get; set; }
        public double lon { get; set; }
        public string timezone { get; set; }
        public string isp { get; set; }
        public string org { get; set; }
        public string @as { get; set; }
        public string query { get; set; }
    }
}