Date and time

for example

public class Order{
    public int OrderId {get;set;}
    public DateTime CreateDate {get;set;}
}

To save DateTime to your sql database

using (MyDbContext db = new MyDbContext){
    Order order = new Order() { OrderId = 1, DateCreate = DateTime.Now.Date };
    db.Order.Add(order);
    db.SaveChanges();
}