SSLProtocolExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace System.Net
{
    using System.Security.Authentication;
    public static class SecurityProtocolTypeExtensions
    {
        public const SecurityProtocolType Tls12 = (SecurityProtocolType)SslProtocolsExtensions.Tls12;
        public const SecurityProtocolType Tls11 = (SecurityProtocolType)SslProtocolsExtensions.Tls11;
        public const SecurityProtocolType SystemDefault = (SecurityProtocolType)0;
    }
}

namespace System.Security.Authentication
{
    public static class SslProtocolsExtensions
    {
        public const SslProtocols Tls12 = (SslProtocols)0x00000C00;
        public const SslProtocols Tls11 = (SslProtocols)0x00000300;
    }
}