aspnetcore/src/Microsoft.AspNet.PipelineCore/Security/SignInContext.cs

using System;
using System.Collections.Generic;
using System.Security.Claims;
using Microsoft.AspNet.HttpFeature.Security;

namespace Microsoft.AspNet.PipelineCore.Security
{
    public class SignInContext : ISignInContext
    {
        public SignInContext(IList<ClaimsIdentity> identities, IDictionary<string, string> dictionary)
        {
            if (identities == null)
            {
                throw new ArgumentNullException("identities");
            }
            Identities = identities;
            Properties = dictionary ?? new Dictionary<string, string>(StringComparer.Ordinal);
            Accepted = new List<string>();
        }

        public IList<ClaimsIdentity> Identities { get; private set; }

        public IDictionary<string, string> Properties { get; private set; }

        public IList<string> Accepted { get; private set; }

        public void Accept(string authenticationType, IDictionary<string, object> description)
        {
            Accepted.Add(authenticationType);
        }
    }
}