每次对Windows工作流程进行更改时，如何避免重建数据库

I am building a Windows Workflow into a .Net webapp. The problem I have is that every time I add or remove or change an activity in the state machine and then re-compile and run it, it no longer matches up to what is in the database for tracking and persistence. Instead of updating the changes, or creating a new version of the workflow in the database it throws an error. Sometimes it an "index out of bounds" error, other times its "Cannot get the member XXXXX."I am building a Windows Workflow into a .Net we