using Microsoft.Cognitive.CustomVision.Prediction;
using Microsoft.Cognitive.CustomVision.Training;
...
using Microsoft.Rest;
using System;
using System.Linq;
using System.Threading.Tasks;
...

namespace VisionRacing.PredictingRacingImages
{
    class Program
    {
        static void Main(string[] args)
        {
            var trainingKey = "Your Custom Vision training key.";
            var predictionKey = "Your Custom Vision prediction key.";

            Start(trainingKey, predictionKey).Wait();
        }

        private static async Task Start(string trainingKey, string predictionKey)
        {
            var projectName = " ";
            var trainingApi = GetTrainingApi(trainingKey);
            var predictionEndpoint = GetPredictionEndpoint(predictionKey);

            while (!string.IsNullOrEmpty(projectName))
            {
                try
                {
                    Console.Clear();
                    await ListProjects(trainingApi);

                    Console.WriteLine("Please enter a project name or press enter to exit:");
                    projectName = Console.ReadLine();

                    if (!string.IsNullOrEmpty(projectName))
                    {
                        await WorkOnProject(trainingApi, predictionEndpoint, projectName);
                    }
                }
                catch (Exception ex)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine($"An error occurred: {Environment.NewLine}{ex.Message}");

                    if (ex is HttpOperationException)
                    {
                        Console.WriteLine(((HttpOperationException)ex).Response.Content);
                    }

                    Console.ResetColor();
                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine("Press any key to continue");
                    Console.ReadLine();
                }
            }
        }

        ...

        private static PredictionEndpoint GetPredictionEndpoint(string predictionKey)
        {
            return new PredictionEndpoint
            {
                ApiKey = predictionKey
            };
        }

        private static TrainingApi GetTrainingApi(string trainingKey)
        {
            return new TrainingApi
            {
                ApiKey = trainingKey
            };
        }

        private static async Task ListProjects(TrainingApi trainingApi)
        {
            var projects = await trainingApi.GetProjectsAsync();

            if (projects.Any())
            {
                Console.WriteLine($"Existing projects: {Environment.NewLine}{string.Join(Environment.NewLine, projects.Select(p => p.Name))}{Environment.NewLine}");
            }
        }

        ...
    }
}