// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Linq;

using System.Data.Entity;

​

public class Program

{

    public static void Main()

    {

        GenerateData();

​

        using (var context = new EntityContext())

        {

            // The count is deferred, it is now cached.

            var count = context.Countries.DeferredCount().Cache();

            Console.WriteLine("Countries Count: " + count);

        }

    }

    public static void GenerateData()

    {

        using (var context = new EntityContext())

        {

            context.Countries.Add(new Country() { Name ="Customer_A" });

            context.Countries.Add(new Country() { Name ="Customer_B" });            

            context.Countries.Add(new Country() { Name ="Customer_C" });

            context.SaveChanges();  

        }

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

​

        }

        public DbSet<Country> Countries { get; set; }

    }

​

    public class Country

    {

        public int CountryID { get; set; }

        public string Name { get; set; }

    }

}