Sitecore 8.x Custom Facet Interface and Implementation

gistfile1.txt

using Sitecore.Analytics.Model.Framework;
using System;

namespace MyNamespace.Facets
{
	public interface ICustomerPaymentFacet : IFacet
	{
		decimal LastPaymentAmount { get; set; }
		DateTime LastPaymentDate { get; set; }
	}

	[Serializable]
	public class CustomerPaymentFacet : Facet, ICustomerPaymentFacet
	{
		public CustomerPaymentFacet()
		{
			EnsureAttribute<decimal>(nameof(LastPaymentAmount));
			EnsureAttribute<DateTime>(nameof(LastPaymentDate));
		}

		public decimal LastPaymentAmount { get => GetAttribute<string>(nameof(LastPaymentAmount)); set => SetAttribute(nameof(LastPaymentAmount), value); }
		public DateTime LastPaymentDate { get => GetAttribute<string>(nameof(LastPaymentDate)); set => SetAttribute(nameof(LastPaymentDate), value); }
	}
}