How to debug .net dll builds on an intermediate server

Is there a way or tool with which I can debug .net dll assemblies on an intermediate server. I have ASP.NET web libraries deployed on an intermediate server.

Update

• Implement debug logic in code to disable / debug. (from @maple_shaft)
• Remote debugging of ASP.NET. (from @maple_shaft)

Question:

• Is there a trace option in ASP.NET that can be turned off / on in the * .config file, allows you to display each class, for example, the * .ASPX tracking function.

Any idea would be greatly appreciated.