1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Linq;
5. using System.Text;
6. using System.Threading;
7. using System.Threading.Tasks;
8.  
9. namespace zdarzenia
10. {
11.     class PrimeFinder
12.     {
13.         public delegate void PrimeFoundHandler(MyAsyncCompletedEventArgs args);
14.         private delegate void PrimeEventHandler(AsyncOperation asyncCallback);
15.         public event PrimeFoundHandler primeFoundHandler;
16.         SendOrPostCallback onCompletedCallback;
17.  
18.         public PrimeFinder()
19.         {
20.             onCompletedCallback = new SendOrPostCallback(Completed);
21.         }
22.  
23.         void Completion(int n,AsyncOperation ao)
24.         {
25.             MyAsyncCompletedEventArgs e = new MyAsyncCompletedEventArgs(n, new Exception(), false, new { });
26.             ao.PostOperationCompleted(onCompletedCallback, e);
27.         }
28.    
29.         private void Completed(object state)
30.         {
31.             if (primeFoundHandler != null)
32.                 primeFoundHandler((MyAsyncCompletedEventArgs)state);
33.             Console.WriteLine("completed");
34.         }
35.  
36.         public bool isPrimal(int n)
37.         {
38.             if (n < 2)
39.                 return false;
40.             for (int i = 2; i < n; i++)
41.                 if (n % i == 0)
42.                     return false;
43.             return true;
44.         }
45.         public void Find(AsyncOperation ao)
46.         {
47.             int n = 10000000;
48.             while (true)
49.             {
50.                 if (isPrimal(n))
51.                     primeFoundHandler.Invoke(new MyAsyncCompletedEventArgs(n, new Exception(),false, new { }));
52.                 n++;
53.             }
54.             Completion(n, ao);
55.         }
56.         public void FindAsync(int taskID)
57.         {
58.             AsyncOperation asOp = AsyncOperationManager.CreateOperation(taskID);
59.             PrimeEventHandler primeEventHandler = new PrimeEventHandler(Find);
60.             primeEventHandler.BeginInvoke(asOp, null, null);
61.         }
62.     }
63. }
64.  
65.  
66.  
67.  
68.  
69. ////////////////////////
70.  
71.  
72. using System;
73. using System.Collections.Generic;
74. using System.Linq;
75. using System.Text;
76. using System.Threading.Tasks;
77.  
78. namespace zdarzenia
79. {
80.    
81.     class Program
82.     {
83.         private static void newPrime(MyAsyncCompletedEventArgs args)
84.         {
85.             Console.WriteLine(args.N + "is prime!");
86.         }
87.         static void Main(string[] args)
88.         {
89.             PrimeFinder primeFinder = new PrimeFinder();
90.             primeFinder.primeFoundHandler += newPrime;
91.             primeFinder.Find();
92.            
93.         }
94.     }
95. }
96.  
97.  
98. /////////////
99.  
100.  
101.  
102. using System;
103. using System.Collections.Generic;
104. using System.ComponentModel;
105. using System.Linq;
106. using System.Text;
107. using System.Threading.Tasks;
108.  
109. namespace zdarzenia
110. {
111.     class MyAsyncCompletedEventArgs : AsyncCompletedEventArgs
112.     {
113.         public int N { get; set; }
114.         public MyAsyncCompletedEventArgs(int n, Exception e, bool cancelled, object state) : base(e,cancelled,state)
115.         {
116.             N = n;
117.         }
118.     }
119. }
120.  
121.