Distributed enterprise applications aggregate the power of mutiple servers and multiple software applications to collaboratively run a single computational task in a transparent and coherent way, so that they appear as a single, centralized system.
It is the 'distributed' aspect of the distributed application architecture that introduces the need for an instrumentation framework that can measure and control the distributed application accross its logical and physical boundaries.
I have been designing and developing instrumentation frameworks (wrappers) for distributed applications on various platforms for over 10 years. I have tried commercial products but for the most part the only way I could get good results was by 'rolling my own'.
The past two days I have been experimenting with the Enterprise Instrumentation Framework (EIF) a free downloadable instrumentation framework from Microsoft.
If you need to add an instrumentation framework to a distributed application I recommend you download Microsoft's Enterprise Instrumentation Framework.
It is good block of modifiable code, suitable for learning what an instrumentation framework is and to modify and deploy as an instrumentation wrapper around a .NET distributed application.