Why do I keep getting exception code e0434352?

If you want to know how to debug CLR exceptions using cdb then read this post.

Exception code e0434352 is the exception code used internally by the CLR to represent most exceptions(*).

Regardless of if you throw a System.NullReferenceException or a System.ArgumentException in C#, you'll throw a SEH exception e0434352 under the covers.

A fun way to validate this theory is to watch what happens to the CLR exceptions settings in cdb. Fire up cdb, and see the state of clr exceptions:

0:000> .shell -ci "sx" findstr clr
 clr - CLR exception - second-chance break - not handled
clrn - CLR notification exception - break - handled
.shell: Process exited 

Now, set the exception handler for exception number e0434352 and recheck the value of the clr exception handler:

0:000> sxe e0434352
0:000> .shell -ci "sx" findstr clr
 clr - CLR exception - break - not handled
clrn - CLR notification exception - break - handled
.shell: Process exited 

Armed with this knowledge I expect this post makes more sense.

NitPickers Corner:
(*) I know of at least Divide by Zero not using this exception code.