How do I prevent Visual Studio from loading a PDB from Temporary ASP.NET Files

Question

I am working on a multi-project solution in Visual Studio 2015 Professional that includes some libraries and an ASP.NET Web MVC application on a system used by multiple developers.

Problem When I set a breakpoint and run the web application with debugging, IISExpress starts but the breakpoint is disabled with the following message.

When I check the Modules window it shows that symbols have been loaded for all the projects in the solution from various folders under this location C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files

What I've Tried

• Clean Solution > Rebuild > Debug
• Manually Delete all bin and obj folders > Rebuild > debug
• Configuring symbols to not be automatically loaded and tried to load the symbols after the web application is already running.
• Verified that Optimize Code is not checked
• Verified that Enable Just My Code is checked
• Import Export Settings > Reset All Settings
• Installed Visual Studio 2019 Community Edition and tried all of the above steps again
• Project Properties > Web > Clicked on the Create Virtual Directory button
• Deleted all files and folders under C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files, %AppData%\Local\Temp\Temporary ASP.NET Files\, and %USERPROFILE%\Documents\My Web Sites > changed the port number in the Project Url on the Web tab of the Project Properties

Question

How can I get Visual Studio to load the symbols from the project bin folder like it should be doing to begin with?

Answer 1

Here're two tips you may try:

1.For the project where you set the breakpoints, right-click project=>Properties=>Build tab(Debug Configuration)=>Advanced=>Set the Debug information to Full

2.Empty the Symbol cache, turn off shadow copying to force it to load assemblies from your bin folder instead of Temporary Asp.net Files folder when running the application.(It will load xx.dll from bin, but I'm not certainly sure it will also load pdb from bin...)

Hope it helps:)