clientwithhandler.cs

 public static HttpClient GetClientInstance()
{
    if (_client == null)
    {
        var handler = new HttpClientHandler();
        if (handler.SupportsAutomaticDecompression)
        {
            handler.AutomaticDecompression = DecompressionMethods.GZip |
                                             DecompressionMethods.Deflate;
        }

        _client = new HttpClient(handler)
        {
            BaseAddress = new Uri(Constants.ApiBaseUrl)
        };
    }

    return _client;
}