using System.Data.Entity;
using System.Threading.Tasks;
public static void Main()
public static async Task MainAsync()
using (var context = new EntityContext())
var futurValue = context.Customers.DeferredCount().FutureValue();
var task = await futurValue.ValueAsync();
Console.WriteLine("Count Customer is : " + task);
public static void GenerateData()
using (var context = new EntityContext())
context.Customers.Add(new Customer() { Name = "Customer_A", Description = "Description"});
context.Customers.Add(new Customer() { Name = "Customer_B", Description = "Description"});
context.Customers.Add(new Customer() { Name = "Customer_C", Description = "Description"});
public class EntityContext : DbContext
public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())
public DbSet<Customer> Customers { get; set; }
public int CustomerID { get; set; }
public string Name { get; set; }
public string Description { get; set; }