vs2010项目作为服务引用无法获得“启用编辑并继续”工作

I have a three tier application in a vs2010 solution. I want to edit the code called from the front end though the service references without having to stop code. I can edit the front end web project without issues but when I try and edit the Logic Project or services Project it says "Changes are not allowed in the following cases..." The only way I can get it to work is enable native debugging under the Service solution is this to be expected? I have a three tier application in a vs2010 sol