D (Isolated Applications and Side-by-side Assemblies)

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DEF-context assemblyIdentity

An assemblyIdentity subelement defining the side-by-side assembly described by the manifest. A DEF-context assemblyIdentity subelement is always the first subelement of an assembly element.

DLL versioning conflict

Compatibility problem. Assembly sharing problems occur when an application installs a version of a shared assembly that is not backward compatible with the previously installed version. A solution to DLL versioning conflicts is to use side-by-side assembly sharing and isolated applications. With side-by-side assembly sharing, multiple versions of the same Windows assembly can run simultaneously. Developers can choose which side-by-side assembly to use.