Visual Studio 2010 Crash during Debugging

I filed this issue on codeplex:

This happens with hardware (G120 or Cobra II) or without (emulator).

This only happens with VB.NET not C#.

This did not happen with the April release:
“NETMF and Gadgeteer Package 2013 R1 Update-1”
but it does happen with this release:
“NETMF and Gadgeteer Package 2013 R2”

Has anybody else seen this? Is this a GHI or NETMF issue?

I think NETMF, but is there a way for some of you GHI folks to check it?

This is costing me so much time.


Hi Andre,

Sorry bout this…

the link is (Slash) workitem (Slash) 2129

I am using the default USB drivers.

This also happens on the Emulator.


It’s visible when you quote it ! :slight_smile:

Thanks Brett


I agree, but am hoping that someone has NETMF framework debug ability and could shed some light on why this is happening in VB but not C#.

Here is some VB test code:

Option Explicit On
Option Strict On

Imports Microsoft.SPOT
Imports System
Imports System.Threading

Namespace MFConsoleApplication1

  Public Module Module1

    Dim timer As Timer
    Dim count As Integer = 0
    ReadOnly Twenty_milliSeconds As TimeSpan = TimeSpan.FromTicks(TimeSpan.TicksPerMillisecond * 20)

    Sub Main()


      timer = New Timer(New TimerCallback(AddressOf TimerCallback), Nothing, Twenty_milliSeconds, Twenty_milliSeconds)

    End Sub

    Sub TimerCallback(state As Object)
      count += 1
    End Sub

  End Module

End Namespace

And the same test code in C#:

using System;
using Microsoft.SPOT;
using System.Threading;

namespace MFConsoleApplication2
  public class Program
    static Timer timer = null;
    static int count = 0;
    static readonly TimeSpan twenty_milliSeconds = TimeSpan.FromTicks(TimeSpan.TicksPerMillisecond * 20);

    public static void Main()

      timer = new Timer(new TimerCallback(timerCallback), null, twenty_milliSeconds, twenty_milliSeconds);


    public static void timerCallback(object state)
      count += 1;


The same code, same functionality, but one causes VS2010 to crash.
At the very least, this is a warning to users.

I can try VB code tomorrow in 2010, to verify.

That would be fantastic.

The plot thickens…

On a hunch I did the same test with a simple Gadgeteer project (Cobra II mainboard).

It works!

Here is the code:

Imports GT = Gadgeteer
Imports GTM = Gadgeteer.Modules

Namespace GadgeteerApp1
  Partial Public Class Program

    Public Sub ProgramStarted()
      Debug.Print("Program Started")

    End Sub

    Dim WithEvents timer As GT.Timer = New GT.Timer(1000)  ' every second (1000ms)

    Dim counter As Integer = 0

    Private Sub timer_Tick(timer As Gadgeteer.Timer) Handles timer.Tick
      counter += 1
    End Sub
  End Class
End Namespace

I manually edited the project files of the NETMF project to match exactly the Gadgeteer project. Same crashing result.

Did you set the framework to 4.2 instead of 4.3?

I do not have 4.3 installed.

I am using:

Visual Studio 2010 (Don’t have 2012 or .NET 4.5 installed).
NETMF and Gadgeteer Package 2013 R2