Multiple-instances lock?

I am using a mysql db. Right now for my multithreads i use lock(staticVar){...}. It works fine. But i can add data via the command line which also uses the DB. It will occasionally throw an e开发者_运维知识库xception or cause my main instance to throw an exception from the sqlite db being lock.

How can i create a mutli instance lock so i no longer get this db is locked exception?

---

For interprocess lock use global Mutex class: link