Clean solution before debugging in Visual Studio with SQLCE

I'm creating a C# WPF ap开发者_开发技巧p with SQLCE. Each time before I debug, I have to run "clean solution" or it will throws out a XmlParseException. Why? What is clean solution - is there some sort of caching in SQLCE?

I am not sure it has anything with SQLCE. Clean Solution - deletes all the compiled and temporary files associated with a solution. It ensures that the next build is a full one, rather than only changed files being recompiled. You can get more info in the SO link What is clean solution