How to know which version of ASP.net it is? -

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how can know version of asp.net built in looking asp.net project. please list different ways identify version?

thank you

you need careful approach use here because updates .net framework under asp.net seemingly run under previous version numbers. example;

  • asp.net 2.0 websites might running v2.0 or v3.5 frameworks and
  • asp.net 4.0 websites might running v4.0 or v4.5 frameworks

there couple of ways check exact version running, on web page add:

<%= system.environment.version.tostring() %>

as example;

  • if have v4.0 installed you'll see v4.0.30319.1008
  • if have v4.5 installed you'll see v4.0.30319.34209

that running version. can check registry installed versions at:

hkey_local_machine\software\microsoft\net framework setup\ndp\v4\full

within location @ version node.

  • if have v4.0 installated see v4.0.30319
  • if have v4.5 installated see v4.5.51209

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