Breakpoints behaving strangely in visual studio

Question

I am having two issues with the debugger using visual studio version 9.0.30729.1 using .net 3.1

Issue one - I hit a breakpoint, and F10, F11 do not move me to the next instruction. If I repeatedly press F10 I will eventually step to the next instruction. I can place another breakpoint further down in the code and do an F5 to get to the next breakpoint - but I miss the ability to step.

Issue two - I hit my first breakpoint, do an F5 or F10 and the program continues without stopping.

These issues seem to occur semi randomly. Sometimes they clean themselves up if I shut down visual studio and reboot my computer - but not always. This does not occur as often in my unit tests as with the GUI application.

Any ideas will be appreciated.

Answer 1

Make sure the source code hasn't changed after you've started a debugger...

Answer 2

Do you have a great deal of threads in the program? Could be Thread 1 breaks, you step, thread 2 breaks at the same point that thread 1 just broke at

Answer 3

Just for giggles, try turning off just my code. Uncheck the "just my code ..." option under (Tools -> Options -> Debugger -> General)

JMC can cause odd behavior in scenarios you wouldn't necessarily expect.

Answer 4

Make sure your .pdb files are current, otherwise the source you're debugging and the source you're running might not match.

Answer 5

Try cleaning up your solution directory by deleting (renaming) all files generated by Visual Studio (*.ncb, *.suo, obj/, bin/, and maybe some more).