Someone on the Stanski mailing list recently asked about a particular version of the .NET Framework (v1.1.4322.2379 which seems to almost be MIA and almost no useful information on Google). What came out of the conversation are a couple of applications/tools.
The first is a free .NET version checking utility which the guys across at TMG Development have built. On their download site they also have a quite comprehensive list of the different framework versions (although the mysterious version is missing from that list too).
Early this afternoon I also came across a Microsoft site that will inspect the current version of a dll and provide you with information about what the dll is, when it was shipped and in which packages it was included – this might some day be useful so I figured I’d keep a reference to it here.