VS2012加载DLL编译出现试图加载格式不正确的程序； 以及运行出现Mixed mode assembly is built against version 'v2.0.50727' of the

VS2012加载DLL编译出现试图加载格式不正确的程序；以及运行出现Mixed mode assembly is built against version 'v2.0.50727' of theruntime and cannot be loaded in the 4.0 runtime without additionalconfiguration informationVS2012加载DLL编译出现试图加载格式不正确的程序；以及运行出现Mixed mode