using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        try

        {

            using (Customer cust = new Customer())

            {

                cust.Open();

                cust.Read();

            }

        }

        catch (Exception ex)

        {

            Console.WriteLine(ex.InnerException);

        //LogMessage(ex.StackTrace)

        }

        finally

        {

        }

    }

​

    public class Customer : IDatabaseOperations

    {

        public void Open()

        {

        }

​

        public void Write()

        {

        }

​

        public void Read()

        {

        }

    }

​

    interface IDatabaseOperations

    {

        void Open();

        void Read();

        void Write();

    }

}