public class IDisponseTest : IDisposable{private bool isReadyDisposed = false;~IDisponseTest(){//析构函数调用时不释放托管资源，因为交由GC进行释放Disponse(false);}public void Dispose(){//用户手动释放托管资源和非托管资源Disponse(true);//用户已经释放了托管和非托管资源，所以不需要再调用析构函数GC.SuppressFinalize(this);//如果子类继承此类时，需要按照如下写法进行。//try//{//    Disponse(true);//}//finally//{//    base.Disponse();//}
        }public virtual void Disponse(bool isDisponse){//isReadyDisposed是控制只有第一次调用Disponse才有效才需要释放托管和非托管资源if (isReadyDisposed)return;if (isDisponse){//析构函数调用时不释放托管资源，因为交由GC进行释放//如果析构函数释放托管资源可能之前GC释放过，就会导致出现异常//托管资源释放
            }//非托管资源释放isReadyDisposed = true;}}

    class Program{static void Main(string[] args){CubeEnum cubelist = new CubeEnum(50);foreach(Cube cube in cubelist){Console.WriteLine("立方体长：" + cube.Length + ",宽" + cube.Width + ",高" + cube.Height);}Console.Read();}}//立方体，长、宽、高public class Cube{public int Length { get; set; }public int Width { get; set; }public int Height { get; set; }}/// <summary>/// 立方体迭代集合，继承了IEnumerable和IEnumerator/// </summary>public class CubeEnum : IEnumerable, IEnumerator{//索引public int Index { get; set; }//立方体集合public Cube[] cubelist { get; set; }//初始化立方体集合public CubeEnum(int count){this.Index = -1;cubelist = new Cube[count];for (int i = 0; i < count; i++){cubelist[i] = new Cube();cubelist[i].Length = i * 10;cubelist[i].Width = i * 10;cubelist[i].Height = i * 10;}}//实现IEnumerable的 GetEnumerator() 方法获得IEnumerator对象public IEnumerator GetEnumerator(){return (IEnumerator)this;}//当前Cube立方体public object Current{get { return cubelist[Index]; }}//往下一步移动public bool MoveNext(){Index++;if (Index < cubelist.Length){return true;}return false;}//重置索引public void Reset(){Index = -1;}}