Visual Studio 2022 docker debugging - "no symbols have been loaded"

Question

I'm trying to debug two C# .NET 6.0 Docker containers from Visual Studio 2022, but the breakpoints I set always show "no symbols have been loaded".

The two Docker containers are in a docker-compose.yml file, at version 3.9 and Docker Desktop shows them running okay.

In VS2022, I've tried Debug > Attach to Process with:

• Connection Type of "Docker (Linux Container)"
• Debug these Code types set to "Managed (.NET Core for Unix)".

I can list the contents of the containers and see the .pdb files.

I've tried deleting the containers and images in Docker Desktop, cleaning the VS solution and re-building and re-starting the containers, but get the same error.

Answer 1

If you're trying to debug a referenced project make sure that DebugType option is set to portable to create cross-platform PDB file in the referenced project file. Learn more about DebugType in C# Compiler Options that control code generation.

<PropertyGroup>
  <DebugType>Portable</DebugType>
</PropertyGroup>