How to debug into my nuget package deployed from TeamCity?

Solution 1:

Traditional method

Put the pdb in the NuGet package alongside the dll.
Add the source code to the Debug Source Files for the solution that references the package.

This means you'll be able to step through code and view exceptions, but you might have to find a file on disk and open it before you can set a breakpoint. Obviously you need to be careful that the source is at the right revision.

More detail on step

If you're currently packaging without a Nuspec, you'll need to create a Nuspec, then add the pdb to the list of files in the lib folder "NuGet spec" may be a useful command for generating the initial spec as defined in NuGet docs. Then ensure the Team City Nuget Pack step is referencing your new nuspec.

More detail on step 2

When you have a solution open, right click on Solution, select Properties...Common Properties...Debug Source Files, and add the root source directory for the relevant binary reference. Or see MSDN. Note, you can't open the solution properties while debugging.

Still not hitting breakpoints?

Try disabling this from Tools->Options: Disable exact source match

Modern way for public or private repos

To ensure the exact version of the source is available, embed it at build time.

From Visual Studio 2017 15.5+ you can add the EmbedAllSources property:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <EmbedAllSources>true</EmbedAllSources>

Modern way for public repos

To keep your nuget and library size small, you can use the sourcelink package.

It generates a pdb that directs the debugger to the correct version of the file from your VCS provider (e.g. GitHub, BitBucket).

Solution 2:

The latest version of dotPeek (free!) can act as a symbol server and generate pdb files on the fly. This has allowed me to debug into the dlls that are served via teamcity.

Download it here:

http://blog.jetbrains.com/dotnet/2014/04/09/introducing-dotpeek-1-2-early-access-program/

Instructions on how to set it up here.

https://web.archive.org/web/20160220163146/http://confluence.jetbrains.com/display/NETCOM/dotPeek+Symbol+Server+and+PDB+Generation