...
using System;
...

namespace VisionRacing.AnalyzeKartingImage
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                var apiKey = "Your Cognitive Services Vision API Key.";
                var apiUrl = "Cognitive Services Vision API URL.";

                var kartingImageUrl = "https://github.com/vivienchevallier/Article-AzureCognitive.Vision-Racing/raw/master/Images/Karting/Karting%20(9).jpg";

                AnalyzeImage(apiKey, apiUrl, kartingImageUrl).Wait();
            }
            catch (Exception ex)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine(ex.Message);
                Console.WriteLine();
            }

            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine();
            Console.WriteLine("Press any key to exit...");
            Console.ReadLine();
        }
        ...
    }
}