Stripe TLS 1.2 integration. Sample code to ensure TLS 1.2 support in OS, library and framework level using C# HttpClient

StripeTLS1.2 Check

//No third party library required for this code.

using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

internal static class Stripe
{
    internal static async Task<string> DoesTLS12Support()
    {
        const string apiEndPoint = "https:api-tls12.stripe.com/v1/charges";
        string result = "TLS 1.2 supported, no action required.";

        try
        {
            var handler = new HttpClientHandler
            {
                Credentials = new NetworkCredential { UserName = "REPLACE_WITH_YOUR_SECRET_KEY" },
                PreAuthenticate = true
            };

            using (var client = new HttpClient(handler))
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
                var response = await client.SendAsync(new HttpRequestMessage(HttpMethod.Get, apiEndPoint)).ConfigureAwait(false);
                await response.Content.ReadAsStringAsync().ConfigureAwait(false);
            }
        }
        catch (System.Exception)
        {
            result = "TLS 1.2 is not supported. You will need to upgrade your integration.";
        }
        return result;
    }
}