Question: ASP.NET 5, DNX & Kestrel: Not hitting breakpoints


ASP.NET 5, DNX & Kestrel: Not hitting breakpoints

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Added at 2016-01-04 14:01

Breakpoints are not being hit when debugging our DNX projects referenced in a ASP.NET 5 web API project hosted with Kestrel (all in the same solution and in the src folder). Debugging with IIS Express works fine.

What troubleshooting steps can be taken to solve this problem?

No binaries or PDBs are created with DNX projects when debugging, so I am very unsure as to where to start.

project.json commands:

"commands": {
  "web": "Microsoft.AspNet.Server.Kestrel"

Project properties:

Project properties

Note: Using the RC1 1.0.0-rc1-final libraries in all projects.


  • Breakpoints in the Startup.cs project are hit just fine, but not in other projects.
  • I have double checked and reinstalled the 1.0.0-rc1-update1 DNX runtime. I have uninstalled all other runtimes.
  • I have confirmed that PATH reflects the DNX runtime correctly.
  • I have deleted all project.lock.json files and DNU restored.
  • The actual breakpoint pin is red and doesn't indicate that there should be any problem.
  • global.json is using the correct runtime:

      "projects": [ "src", "test", "." ],
      "sdk": {
          "version": "1.0.0-rc1-update1",
          "runtime": "clr",
          "architecture": "x86"


In the Modules window, I can see that the projects' symbols aren't loading:


How can I fix this?

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ASP.NET 5, DNX & Kestrel: Not hitting breakpoints

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