visual Unhandled exception in Debugger::HandleIPCEvent when breaking on certain breakpoint

Question

I get the following exception (in Dutch, English translation follows in the text) which breaks my debugger when I press 'OK' it stops the debug session and closes the application:

Translated in text:

--------------------------- LerTemperaturaWPF.vshost.exe - Application Error --------------------------- INTERNAL ERROR: Unhandled exception in Debugger::HandleIPCEvent. Event ID=0x246. Exception code=0xc0000005, Eip=0x68fbaeca. Process ID=0x1094 (4244), Thread ID=0x10a4 (4260). --------------------------- OK    --------------------------- 

This happens if the first time the debugger breaks are inside a certain piece of code:

private void PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) {     // Set value of property, only when the long editor is selected (no optionlist item is selected)     if (this.Editor.SelectedItem != null)     {         if (this.Editor.SelectedItem as OptionForList == null)         {             this.Editor.SelectedValue = ((Management.Property)this.Editor.SelectedItem).Value;             this.Editor.SelectedIndex = 0;         }     } } 

It happens when I place the breakpoint inside the 2nd if statement, before the second if statement (where ever I place it). It gives me no problems.

If I make sure the first break the debugger has is before this code and afterward it hits a breakpoint in this code there are no problems either. The debugger must have broken before getting to this code. Now I do not think it has anything to do with this code (90% certain).

The property changed is a user control and somehow I think the debugger can't handle the user control properly? maybe?

Has anyone seen this behavior before and know how to fix this? do I need to turn off (or on) some of the debug settings??

Answer 1

Right click on the project/solution -> Properties -> Debug -> Check "Enable native code debugging".

Answer 2

(1) On the Debug menu->Windows->Exceptions, and enable all Thrown check boxes. Debug the application, it will show you the actual and detailed errors in a message Box.

(2) Right click on the project/solution -> Properties -> Debug -> Uncheck "Enable visual studio hosting process".

(3) Please also change the Platform target (X86/Any CPU/X64), re-compile the app, debug it again.

(4)Tools > Options > Debugging > General > "Use Managed Compatibility Mode" checkbox.