JIT compiler and "Method Not Found" error
Actually it can be “Could Not Load Type” too, but the reason is the same: you are referencing the wrong DLL version. well, this is totally understandable; of course you are going to get this exception when you use an outdated DLL that lacks the new extra parameter to THAT certain method. But the interesting part is it will not happen when you first run your application, and neither when execution reaches the changed method; it will happen when code-execution reaches a place that REFERENCES that changed method. ...