Q:

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.

A:

  出现以上错误,一般是因为低版本的asp.net程序运行在高版本的asp.net平台上所造成的,如:asp.net 1.1的程序运行在asp.net 2.0或asp.net 3.5上就会出现以上错误,只要切换到对应版本的asp.net平台即可解决该问题.