Out Of Memory Exception in WinForms

I created a TaskBar application in Visual Studio which minimizes i开发者_JAVA百科tself inside the system tray and show notifications to the user based on the database change. Whenever a new task assigned to the user he will notified at the system tray like a balloon popup. But whenever the applications runs for an average 15 hours time suddenly my applications crashes and shows out of memory exception. So i have some questions please answer them.

1. How can i debug this issue ? I can't wait for 15 hours and check for this issue ?
2. Is there any tool available to check the memory leakage of my application which can directly point at my issue ?
3. How can i generate out of memory exception to my program so it will be debugged easily and fast ?
4. What should i do to avoid memory leakage in my code ?

Image of my application :

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In response to your 4 questions:

1: You can intercept the My.Application.Startup event to add some exception-handling code. Note that the code for the Startup event handler is stored in the ApplicationEvents.vb file, which is hidden by default. Here is some C# code (almost identical in VB) that will setup your exception handlers:

// Event handler for handling UI thread exceptions.
Application.ThreadException += 
    new ThreadExceptionEventHandler(App_UiThreadException);

// Force all Windows Forms errors to go through our handler.
// NB In .NET 4, this doesn't apply when the process state is corrupted.
Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);

// Event handler for handling non-UI thread exceptions. 
AppDomain.CurrentDomain.UnhandledException += new 
    UnhandledExceptionEventHandler(App_NonUiThreadException);

// Run the application.

2: You can use the free CLR Profiler to check memory usage.

3: You can throw the OutOfMemory exception yourself if you want to see how your program will handle it.

4: One useful resource is Debug Leaky Apps. Another one is Identify CLR Memory Leaks.

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You can examine the stack trace as follows (posted as an answer so it would format correctly):

Try
    Dim s As String = "1234".Substring(3, 5) 'some code that throws an exception
Catch ex As Exception
    MsgBox("Error: " + ex.Message + vbCrLf + vbCrLf + "Stack Trace: " + ex.StackTrace, MsgBoxStyle.Exclamation)
End Try