Update threading timer snippets

snippets/cpp/VS_Snippets_CLR_System/system.Threading.Timer/CPP/source2.cpp

@@ -2,32 +2,45 @@
 using namespace System;
 using namespace System::Threading;
 
-public ref class Example
+ref class TimerState
+{
+public:
+	int counter;
+};
+
+ref class Example
 {
 private:
-    static Timer^ ticker;
+	static Timer^ timer;
 
 public:
-    static void TimerMethod(Object^ state)
-    {
-        Console::Write(".");
-    }
+	static void TimerTask(Object^ state)
+	{
+		Console::WriteLine("{0:HH:mm:ss.fff}: starting a new callback.", DateTime::Now);
+
+		TimerState^ timerState = dynamic_cast<TimerState^>(state);
+		Interlocked::Increment(timerState->counter);
+	}
 
-    static void Main()
-    {
-        TimerCallback^ tcb =
-           gcnew TimerCallback(&TimerMethod);
+	static void Main()
+	{
+		TimerCallback^ tcb = gcnew TimerCallback(&TimerTask);
+		TimerState^ state = gcnew TimerState();
+		state->counter = 0;
+		timer = gcnew Timer(tcb, state, 1000, 2000);
 
-        ticker = gcnew Timer(tcb, nullptr, 1000, 1000);
+		while (state->counter <= 10)
+		{
+			Thread::Sleep(1000);
+		}
 
-        Console::WriteLine("Press the Enter key to end the program.");
-        Console::ReadLine();
-    }
+		timer->~Timer();
+		Console::WriteLine("{0:HH:mm:ss.fff}: done.", DateTime::Now);
+	}
 };
 
 int main()
 {
-    Example::Main();
+	Example::Main();
 }
-
 // </snippet2>

snippets/csharp/VS_Snippets_CLR_System/system.Threading.Timer/CS/source2.cs

@@ -1,22 +1,41 @@
 // <snippet2>
 using System;
 using System.Threading;
+using System.Threading.Tasks;
 
-public class Example
+class Program
 {
-    private static Timer ticker;
+    private static Timer timer;
 
-    public static void TimerMethod(object state)
+    static void Main(string[] args)
     {
-        Console.Write(".");
+        var timerState = new TimerState { Counter = 0 };
+
+        timer = new Timer(
+            callback: new TimerCallback(TimerTask),
+            state: timerState,
+            dueTime: 1000,
+            period: 2000);
+
+        while (timerState.Counter <= 10)
+        {
+            Task.Delay(1000).Wait();
+        }
+
+        timer.Dispose();
+        Console.WriteLine($"{DateTime.Now:HH:mm:ss.fff}: done.");
     }
 
-    public static void Main()
+    private static void TimerTask(object timerState)
     {
-        ticker = new Timer(TimerMethod, null, 1000, 1000);
+        Console.WriteLine($"{DateTime.Now:HH:mm:ss.fff}: starting a new callback.");
+        var state = timerState as TimerState;
+        Interlocked.Increment(ref state.Counter);
+    }
 
-        Console.WriteLine("Press the Enter key to end the program.");
-        Console.ReadLine();
+    class TimerState
+    {
+        public int Counter;
     }
 }
 // </snippet2>

snippets/visualbasic/VS_Snippets_CLR_System/system.Threading.Timer/VB/source2.vb

@@ -1,19 +1,35 @@
 ' <snippet2>
-Imports System
 Imports System.Threading
 
-Public Class Example
-    Private Shared ticker As Timer
+Module Program
 
-    Public Shared Sub TimerMethod(state As Object)
-        Console.Write(".")
+    Private Timer As Timer
+
+    Sub Main(args As String())
+
+        Dim StateObj As New TimerState
+        StateObj.Counter = 0
+
+        Timer = New Timer(New TimerCallback(AddressOf TimerTask), StateObj, 1000, 2000)
+
+        While StateObj.Counter <= 10
+            Task.Delay(1000).Wait()
+        End While
+
+        Timer.Dispose()
+        Console.WriteLine($"{DateTime.Now:HH:mm:ss.fff}: done.")
     End Sub
 
-    Public Shared Sub Main()
-        ticker = New Timer(AddressOf TimerMethod, Nothing, 1000, 1000)
+    Private Sub TimerTask(ByVal StateObj As Object)
+
+        Console.WriteLine($"{DateTime.Now:HH:mm:ss.fff}: starting a new callback.")
 
-        Console.WriteLine("Press the Enter key to end the program.")
-        Console.ReadLine()
+        Dim State As TimerState = CType(StateObj, TimerState)
+        Interlocked.Increment(State.Counter)
     End Sub
-End Class
+
+    Private Class TimerState
+        Public Counter As Integer
+    End Class
+End Module
 ' </snippet2>