使用触发器处理TeamSystem DB中的计算字段

In our custom process there are a few fields that are calculated fields. Today I am using Team System events and a web service to calculated these but in all honesty its a little clunky. I had to add a delay because once saved the TFSService does make a change to the Work item a person might want to make another change right away and then get an error stating the Work Item has been changed. So the service waits a bit to make sure all edits are completed (I chose 30 secs.) Other than that its not bad.In our custom process there are a few fields th