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  1. Jonathan,

    I also recently had an ExecutionEngineException from the DataContractSerializer with WCF recently.
    It turned out that the problem was one of my DataContract’s DataMembers were of type IList. Changed it to Collection, and the exception went away.
    Don’t know if this will help with your issue, but just thought I’d let you (and your readers) know

    Jax Reply

  2. I had the same problem, investigated for days. Turned out the solution by Jax also applied to me (replace ILIST with Collection on DataMember). Btw, thanks alot for the info Jax! Saved my day…


    Daniel Reply