When debugging a web application my Visual Studio 2013 loads old PDB symbols. Clearing the solution folder and Temporary ASP.NET Files only works once. The problem reappears as soon as I make another change. In details:
- (Start VS)
- Start the project using F5 => Breakpoints load
- Make a change (e.g. add a whitespace)
- Press F5 => Breakpoints do not load
- Wait a little while (maybe 30sec). Press F5. Breakpoints load.
When the breakpoints do not load the Modules Window shows mismatched paths and sometimes it shows multiple versions of my DLL:
The old DLL and PDB version (1) is still loaded (load order 67). The new DLL (157) uses the old PDB version. In Process Explorer I see that the w3wp process has two AppDomains which apparently correspond to the two app versions. After a few seconds the old version is unloaded but of course the new DLL continues to use the old PDB.
In the file system under Temporary ASP.NET Files the DLLs and PDBs are correctly paired. Each pair has its own folder.
How can I make Visual Studio load matching PDBs? Alternatively, how can I make IIS unload the old app before it starts the new version and signals Visual Studio that it is OK to attach now?