public virtual ContactIdentifier CreateContact(string email, PersonalInformation personalInfo)
    {
        var identifier = new ContactIdentifier(ContactSource, email, ContactIdentifierType.Known);
        var identifiers = new ContactIdentifier[] { identifier };

        try
        {
            if (CurrentTracker != null && CurrentTracker.IsActive && CurrentTracker.Session != null)
            {
                CurrentTracker.Session.IdentifyAs(ContactSource, email);
                CurrentTracker.Contact.Tags.Set("isEmpty", "false");
            }

            using (var client = SitecoreXConnectClientConfiguration.GetClient())
            {
                var knownContact = new Contact(identifiers);
                client.SetFacet(knownContact, PersonalInformation.DefaultFacetKey, personalInfo);
                client.AddContact(knownContact);
                client.Submit();
            }
        }
        catch (XdbExecutionException ex)
        {
            Log.Error("Exception creating contact", ex, this);
        }
        return identifier;
    }

public virtual bool CreateContact2(string email, PersonalInformation personalInfo)
    {
        if (CurrentTracker.Contact.IsNew)
        {
            var manager = Factory.CreateObject("tracking/contactManager", true) as ContactManager;

            if (manager != null)
            {
                CurrentTracker.Contact.ContactSaveMode = ContactSaveMode.AlwaysSave;
                manager.SaveContactToCollectionDb(CurrentTracker.Contact);

                var trackerIdentifier = new IdentifiedContactReference(Sitecore.Analytics.XConnect.DataAccess.Constants.IdentifierSource,
                    CurrentTracker.Contact.ContactId.ToString("N"));

                using (XConnectClient client = SitecoreXConnectClientConfiguration.GetClient())
                {
                    try
                    {
                        var contact = client.Get(trackerIdentifier, new ContactExpandOptions());

                        if (contact != null)
                        {
                            client.SetFacet(contact, PersonalInformation.DefaultFacetKey, personalInfo);
                            client.Submit();
                            manager.RemoveFromSession(CurrentTracker.Contact.ContactId);
                            CurrentTracker.Session.Contact = manager.LoadContact(CurrentTracker.Contact.ContactId);
                        }
                    }
                    catch (XdbExecutionException ex)
                    {
                        Log.Error("Error in creating Contact.", ex, this);
                        return false;
                    }
                }
            }
        }
        return true;
    }

using (var client = this.CreateClient())
            {
                     //Set your facets here
                    // Interaction
                    Guid channelId = Guid.Parse(ChannelId);
                    string userAgent = "Form Update Contact";
                    var interaction = new Interaction(contact, InteractionInitiator.Brand, channelId, userAgent);

                    var ItemID = Guid.Parse(HomeId);

                    PageViewEvent pageView = new PageViewEvent(DateTime.UtcNow, ItemID, 3, "en")
                    {
                        Duration = new TimeSpan(0, 0, 30),
                        Url = "/Home"
                    };

                    interaction.Events.Add(pageView);

                    client.AddInteraction(interaction);
                    client.Submit();
}