class Program    {static List<Expression> mExpressions = new List<Expression>();static Random mRan = new Random();static void Main(string[] args)        {try            {string dbpath = @"Data Source=d:\\northwind.db;Pooling=true;FailIfMissing=false;";                DBContext.SetConnectionDriver<SqliteDriver>(ConnectionType.Context1);                DBContext.SetConnectionString(ConnectionType.Context1, dbpath);                mExpressions.Add(Order.shipCountry == "Switzerland");                mExpressions.Add(Order.shipRegion == "RJ");                mExpressions.Add(Order.customerID.In(Customer.customerID, Customer.country == "UK"));                mExpressions.Add(Order.customerID.In(Customer.customerID, Customer.country == "Germany"));                mExpressions.Add(Order.orderDate > "1997-8-5");                mExpressions.Add(Order.orderDate < "1997-12-1");                mExpressions.Add(Order.orderDate > "1997-5-1" & Order.orderDate<"1997-11-5");                System.Threading.Thread thread;for (int i = 0; i < 10; i++)                {                    thread = new System.Threading.Thread(new System.Threading.ParameterizedThreadStart(Test                        ));                    thread.Start();                }

            }catch (Exception e_)            {                Console.WriteLine(e_.Message);            }

        }static void Test(object obj)        {while (true)            {                Expression exp = mExpressions[mRan.Next(mExpressions.Count - 1)];                Console.WriteLine(exp.Count<Order>());                System.Threading.Thread.Sleep(mRan.Next(50, 5000));            }        }

    }