环境：windows 2003

Server Error in '/' Application.

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Bad IL format. 

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.BadImageFormatException: Bad IL format.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[BadImageFormatException: Bad IL format.]

   WebConfig.Config.BaseConfig.old_acctor_mc() +0

   WebConfig.Config.BaseConfig..cctor() +11

[TypeInitializationException: The type initializer for 'WebConfig.Config.BaseConfig' threw an exception.]

   WebConfig.Config.BaseConfig.OnApplicationStart() +0

   ASP.global_asax.Application_Start(Object sender, EventArgs e) +5

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Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082 

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