c# - Compatibility.... Downgrade a project from vs2012 to vs2008 -

c# - Compatibility.... Downgrade a project from vs2012 to vs2008 -

i have project created on own pc visual studio 2012, initialy entity framework 4.5

i made compatible entity framework 3.5 because computers application run vista ones.. ( o_o )

after lot of debug, creating new db compatible, creating model of new database, performed first downgrade , it's working on computer entity framework 3.5 can see in screenshot: http://imagik.fr/view/128976

i can start .exe on computer without problem. have modified app.config connection string give right path database on computer , have tried, insta crash when works on mine..

finally have installed vs 2008 on 1 vista computer , can't import vs 2012 project, recent. if create new project on 2008 , create classes copy/paste, add together libraries , references, have problem db. database.mdf version 706 , can't upper 655.

i'm lost these compatibilities problems... know can upgrate 2008 project 2012, possible in other way? should solution?

if not, supposed do? told me "free technology", isn't free @ all.....

if met kind of problems..

thanks in advance help.

ps: if need other informations, can give screens, inquire me.

ps°2: know there lot of problems mine on web , on stackoverflow, have done said (edit properties of project , create entityframework 3.5, adding .csproj of 2012 on blank vs 2008 project, etc.)

c# entity-framework visual-studio-2012 visual-studio-2008 compatibility