MailChimp example in C#

MailChimp.cs

    class Program
    {
        static void Main()
        {
            const string apiKey = "99999999999999999999999999999999-us2";   // Replace it before
            const string listId = "b999jw9999";                             // Replace it before

            var options = new List.SubscribeOptions{DoubleOptIn = true,EmailType = List.EmailType.Html,SendWelcome = false};
            var merges = new List<List.Merges> { new List.Merges("[email protected]", List.EmailType.Html) { { "FNAME", "John" }, { "LNAME", "Smith" } } };
            var mcApi = new MCApi(apiKey, false);

            var batchSubscribe = mcApi.ListBatchSubscribe(listId, merges, options);

            if (batchSubscribe.Errors.Count > 0)
                Console.WriteLine("Error:{0}", batchSubscribe.Errors[0].Message);
            else
                Console.WriteLine("Success");

            Console.ReadKey();
        }
    }

Hi Fernardo!
I tried your code but is not working, in .NET side said that suscriber was added, but when i check in MailChimp List, the suscriber is not being added.

I download from nuget so in package config file i have the following:

I really appreciate if you can help me
Greetings from Chile!