Debug an ASP.NET Application with the Microsoft CLR DebuggerThe Microsoft .NET Framework Software Development Kit (SDK) contains a lightweight debugger for debugging .NET applications on computers that do not have Visual Studio .NET installed.
This article describes how to configure your ASP.NET application for debugging, how to attach to the ASP.NET worker process (Aspnet_wp.exe) with the Microsoft CLR Debugger, and how to debug the application.