示例

Sample.cs

using System;

namespace ClassLibrary1
{
    public class Sample : System.IDisposable
    {
        //constructor
        public Sample()
        {
            Console.WriteLine("Database connected.");
        }

        //method
        public void DisplayDataFromDatabase()
        {
            Console.WriteLine("Reading data from database");
        }

        //Dispose
        public void Dispose()
        {
            Console.WriteLine("Database disconnected");
        }
    }
}

Program.cs

using System;
using ClassLibrary1;

namespace IDisposableExample
{
    class Program
    {
        static void Main()
        {
            //create object using "using structure"
            using (Sample s = new Sample())
            {

                s.DisplayDataFromDatabase();

            }

            Console.WriteLine("Some other work here");

            Console.ReadKey();
        }
    }
}