Who's expired my Gh_Component?

Dear all,

I'm writing some C# grasshopper components and was wondering if its possible to tell which input parameter(s) triggered SolveInstance.

I'm trying to avoid unnecessary processing of input data if it hasnt changed.

It looks like I can catch Parameters.ParameterChanged events and keep a record of what has changed or is there something i can test directly within SolveInstance?

Thx

Tristan