1 namespace t2
 2 {
 3     class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             var dd = new DisposeCls();
 8             dd.Dispose();
 9             dd = null;
10             GC.Collect();
11 
12             Console.ReadKey();
13         }
14     }
15 
16     public class DisposeCls : IDisposable
17     {
18         ~DisposeCls(){
19             Console.WriteLine("call ~~~");
20         }
21 
22         public void Dispose()
23         {
24             Console.WriteLine("call dispose");
25         }
26     }
27 }