WCF未处理的异常在执行当前Web请求期间发生

Question

I have a WCF service that is build in VS2008 When I publish the service and run it in IIS (32 bit applications are enabled in application pool) then fine, it works. But when I try debugging the application (platform targets of all the projects are Any CPU), I get the following error:

Common Language Runtime detected an invalid program.

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.InvalidProgramException: Common Language Runtime detected an invalid program.

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: 
[InvalidProgramException: Common Language Runtime detected an invalid program.]
   System.ServiceModel.HostingManager..ctor() +0
   System.ServiceModel.ServiceHostingEnvironment.EnsureInitialized() +463
   System.ServiceModel.ServiceHostingEnvironment.OnEnsureInitialized(Object state) +185
   System.ServiceModel.PartialTrustHelpers.PartialTrustInvoke(ContextCallback callback,     Object state) +314
   System.ServiceModel.ServiceHostingEnvironment.SafeEnsureInitialized() +209
   System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e)     +295
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +344
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +557

What does that error mean?? any help is highly appreciated

Answer 1

The platform your have for development is 32 bit and the platform on which you deploy is 64 bit . Selecting the debug type AnyCPU assembly will JIT to 64 bit code when loaded into 64 bit process and 32 bit when loaded into a 32 bit process. The published assembly / dependent assembly is most probably not compatible for 64 bit and need to be in 32 bit process.

You can read more about choosing the target platform and its impact over here .