IHttpTransportLayerSecurityFeature is just bizzare

[davidfowl]

Should be renamed:

using System.Security.Cryptography.X509Certificates;
using System.Threading.Tasks;
using Microsoft.Framework.Runtime;

namespace Microsoft.AspNet.HttpFeature
{
    [AssemblyNeutral]
    public interface IHttpClientCertificateFeature
    {
        // For sync access to the cert or assignment
        X509Certificate ClientCertificate { get; set; }

        // For async access to the cert
        Task<X509Certificate> GetClientCertificateAsync();
    }
}

[blowdart]

Wait, why not X509Certificate2? This gives you some nice security related properties such as the Key Usage property.