无法加载文件或程序集...试图加载一个不正确的程序格式（System.BadImageFormatException）

我有两个项目，项目A 和项目B 。 项目B 是一个控制台应用程序，它依赖于项目A 。昨天，一切都被今天工作正常，但突然当我运行项目B 我得到这样的：

I have two projects, ProjectA and ProjectB. ProjectB is a console application, which depends on ProjectA. Yesterday, everything was working fine, but suddenly today when I run ProjectB I get this:

BadImageFormatException了未处理：结果
  无法加载文件或程序集项目A，版本= 1.0.0.0，文化=中性公钥= null或它的一个依赖。试图加载程序格式不正确。

BadImageFormatException was unhandled:
Could not load file or assembly 'ProjectA, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.

两者都只是常规项目，与其他任何non-.Net项目没有依赖关系。两者都是充分的.Net - 没有提供原生code，没有的P / Invoke。我有依赖于项目A ，仍然工作得很好。

Both are just regular projects, with no dependencies on any other non-.Net projects. Both are fully .Net - there is no native code, and no P/Invoke. I have other projects which depend on ProjectA and still work just fine.

东西我曾尝试：

• 确保这两个项目都设置为任何CPU，与建立的复选框选中。他们是。


• 确保这两个项目都为同一目标框架的（.NET 4.0客户端配置文件）的


• 在项目B - >参考 - >项目A - >属性中，确保的复制本地的设置为真 _ （我验证ProjectA.dll被正确拷贝）的


• 清洁/重新生成解决方案。我甚至尝试手动删除了这两个项目的/ bin和/ OBJ文件夹。


• 重新启动Visual Studio。重新启动计算机。


• 检查出库的全新副本。

• Make sure both projects are set to "Any CPU," with the build checkbox checked. They are.
• Make sure both projects are for the same Target Framework (.Net 4.0 Client Profile).
• Under ProjectB --> References --> ProjectA --> Properties, make sure "Copy Local" is set to "True" _ (I verified that ProjectA.dll is being copied correctly)
• Clean/Rebuild the solution. I even tried manually deleting the /bin and /obj folders in both projects.
• Restart Visual Studio. Restart my computer.
• Check out an entirely new copy of the repository.

但我仍然得到同样的错误。我不知道我做了什么，使这个，也不知道如何解决它。任何想法？

But I still get the same error. I have no idea what I did to cause this, nor how to fix it. Any ideas?