While upgrading from v1.0 to v2.0 of an ClickOnce application, files/assemblies that have remained unchanged (have the same hash) across the update are not redownloaded from the server. Instead they are just copied over locally in the Clickonce store
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The ClickOnce team now has a team blog at http://blogs.msdn.com/clickonce Keep checking it out for tips and tricks, announcamants and other information on the ClickOnce technology and team.
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