VS2012载入DLL编译出现试图载入格式不对的程序； 以及执行出现Mixed mode assembly is built against version 'v2.0.50727' of the

VS2012载入DLL编译出现试图载入格式不对的程序；以及执行出现Mixed mode assembly is built against version 'v2.0.50727' of theruntime and cannot be loaded in the 4.0 runtime without additionalconfiguration informationVS2012载入DLL编译出现试图载入格式不对的程序；以及执行出现Mixed mode