How to generate a .pdb (debug symbols) for 3rd party code?

I’ve loaded an open source Node editor pluggin for Unity from here.

My problem: code of this pluggin have not any .pdb, so I cannot debug.

What I’ve checked/tried:

  • My solution configuration in Visual studio is set to “Debug”.
  • I’ve downloaded & tried to use “master” & “develop” branch of this plugin from git.

How can I get/generate a .pdb for this code to be able to debug it?

PS: (May be it’s relevant to my issue) I’ve noticed, that only few of .cs files are shown in Solution explorer in Visual studio:

for example, none of framework files are present in Solution explorer:

@Seneral

I’ll not accept this answer, 'cos it doesn’t actually answer my initial question. But it solved my particular problem, so I post it:

My actual problem was an inability to debug code because of non-working breakpoints with message: “The breakpoint will not currently be hit. No symbols have been loaded for this document.”:

And it was solved by simple using “Debug \ Attach Unity debugger” instead of familar to me “Debug \ Attach to Process” in Visual Studio =)