XdbHelper.cs

using Sitecore.Analytics;
using Sitecore.Analytics.Tracking;
using System.Collections.Generic;

namespace MyProject.Foundation.Xdb.Utils
{
    public static class XdbHelper
    {
        public static void TriggerProfileKey(string profileName, string profileKey, int value)
        {
            if (!Tracker.Enabled)
            {
                return;
            }

            if (!Tracker.IsActive)
            {
                Tracker.StartTracking();
            }

            Profile profile;

            if (Tracker.Current.Interaction.Profiles.ContainsProfile(profileName))
            {
                profile = Tracker.Current.Interaction.Profiles[profileName];
            }
            else
            {
                var profiles = new List<Sitecore.Analytics.Model.ProfileData>
                {
                    new Sitecore.Analytics.Model.ProfileData(profileName)
                };

                Tracker.Current.Interaction.Profiles.Initialize(profiles);
                profile = Tracker.Current.Interaction.Profiles[profileName];
            }

            var scores = new Dictionary<string, float> { { profileKey, value } };
            profile.Score(scores);
            profile.UpdatePattern();
        }
    }
}