IIS - Symbols not loaded

Costas

Administrator
Staff member
Story :

ASPX / MVC / WebAPI, is not hitting the breakpoint. Normally when you compile the PRJ the dlls built on bin/debug folder.. Once you navigate to website, the IIS copies all dlls to
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files

and use it from there. more Understanding ASP.NET Dynamic Compilation

Cause :

Sometimes, the website DLLs cant be overwritten, because used by IIS Worker (w3wp.exe), at
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files

as result you getting old .pdb that not map with your current source code.


solution :

shadowCopyBinAssemblies : Optional Boolean attribute. Sets a Boolean value indicating whether the assemblies of an application in the Bin directory are shadow copied to the application’s ASP.NET Temporary Files directory.

JavaScript:
//src - https://stackoverflow.com/a/49677908

<system.web>
	<hostingEnvironment shadowCopyBinAssemblies="false" />
</system.web>



alternative way
-stop iis (end w3wp.exe process)
-rebuild
-start iis

btw one reason this occurring is when running more than one application pools, stop the ones you dont use it, by IISManager
 
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