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----------------------------------------------------------- From: Absent_Minded_Aquarian Message 5 in Discussion Hi! Just before the JITter is called into play, the CLR attempts to check for the presence of the Native Code for an assembly generated using NGEN.EXE utility (which internally uses the MSCORPE.DLL, the native code generator). When native code is generated: its required that all the dependencies are present (for instance, type libraries, DLLs, etc) so that load addresses and type can be generated for the native code. Minus the presence of all dependencies, native code generation will fail. The native code generation uses MVID (Module Identifier) to generate the native code for an assembly's modules so that if there is a recompilation, the MVID can be checked against to see if the cached native image should be used or not. That said, now when an assembly is loaded, prior to the JITter, the CLR checks the GAC for the presence of the cached native code. If it find for the assembly in question, its made sure that the native code is latest, by comparing the MVIDs used to generate the native code and the current MVID's for the assembly modules. If they match, the cached image is the latest and is used for execution. But if the MVIDs differ, the CLR, subjects the assembly to the JITter which then proceeds to do compilation on demand, as it normally does. Read Essential .NET Vol #1: The Common Language Runtime by Don Box for details. Gaurav ---------- Microsoft MVP - .NET WinToolZone - Spelunking Microsoft Technologies http://www.wintoolzone.com/ OpSupport - Spelunking Rotor http://opsupport.sscli.net/ ----------------------------------------------------------- To stop getting this e-mail, or change how often it arrives, go to your E-mail Settings. http://groups.msn.com/bdotnet/_emailsettings.msnw Need help? If you've forgotten your password, please go to Passport Member Services. http://groups.msn.com/_passportredir.msnw?ppmprop=help For other questions or feedback, go to our Contact Us page. http://groups.msn.com/contact If you do not want to receive future e-mail from this MSN group, or if you received this message by mistake, please click the "Remove" link below. On the pre-addressed e-mail message that opens, simply click "Send". Your e-mail address will be deleted from this group's mailing list. mailto:[EMAIL PROTECTED]
