如何通过两个不相关或解耦的方法调用“跨越”事务？

I'm busy building a software update application in C#, WinForms, .NET 3.5, where I have a collection of pluggable task classes with a common base class. I would like one task, the database upgrade, to begin a transaction, and another task, the web site upgrade, to commit or roll back the same transaction, so the web site and DB are always in sync.I'm busy building a software update application