SmtpAuthenticationManager.cs

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using System.Collections.Generic;
 
namespace System.Net.Mail;
 
internal static class SmtpAuthenticationManager
{
    private static readonly List<ISmtpAuthenticationModule> s_modules;
 
    static SmtpAuthenticationManager()
    {
        s_modules = new List<ISmtpAuthenticationModule>();
        Register(new SmtpNegotiateAuthenticationModule());
        Register(new SmtpNtlmAuthenticationModule());
        Register(new SmtpLoginAuthenticationModule());
    }
 
    internal static void Register(ISmtpAuthenticationModule module)
    {
        if (module == null)
        {
            throw new ArgumentNullException("module");
        }
        lock (s_modules)
        {
            s_modules.Add(module);
        }
    }
 
    internal static ISmtpAuthenticationModule[] GetModules()
    {
        lock (s_modules)
        {
            ISmtpAuthenticationModule[] array = new ISmtpAuthenticationModule[s_modules.Count];
            s_modules.CopyTo(0, array, 0, s_modules.Count);
            return array;
        }
    }
}