how to debug .net assembly when it's being used by other process

Question

I have 2 projects A and B written in C# in VS. A is treated as Host applocation, B is a dll. A will load B at runtime by Assembly.LoadFrom and Call B's method. My question is how can I debug B when A Is executing B's dll. I have source code of both projects. but when I Attach B to process A. VS told me B.dll is being used by another process which is A. So I can't set breakpoint of B's code because B's symbol is not loaded. How can I debug B when B is being used by A? thanks!

Answer 1

First start the executable project. Then attach your dll project to exe project using Attach to Process option.

In Visual Studio, you can do this by,

Click on Debug menu --> Chose Attach to process option.

You will see list of all running process, choose appropriate one, and you can debug your dll code.