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I am building a web application that has very high requirement. I wanted to build it first in silverlight and activex, with javascript breaching between them. Later I started considering using xbap. The problem is that xbap demands .net 3.0, and before starting to write an application with such demands I wanted to have a general understanding on the amount of window OS users who have .net framework 3.0 installed. Does anyone has an idea? where can I find such estimations? Thank you!

vondip
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If you have statistics for your website (or feel like coding up such), .NET versions will be sent as part of the User-Agent for IE and Firefox (atleast, I don't use any other browsers, so can't speak for them) by default. You can then get statistics for the people that actually matter: your users.

That aside (or if you don't have a public website at all yet), then you can always do detection code and tell people to go download it if they need it. If you have a site/application that people want to use, most if not all won't begrudge downloading a browser plugin or two.

Matthew Scharley
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Well what you really want is the percentage of your users that have .net 3.0. Do you have a website already? This information is given in the user-agent.

Noon Silk
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  • No, I don't have a website yet and what I am writing should be the center of my website. I was thinking of embadding my project as a facebook app first, so I guess it's a percentage of facebook users? – vondip Aug 15 '09 at 11:34
  • I'd imagine facebook would have those sorts of numbers. If you asked very, very nicely they might give them to you. – Matthew Scharley Aug 15 '09 at 11:41
  • I don't know... any other way to get around this? Are there any websites specializing in this area? – vondip Aug 15 '09 at 11:45
  • Probably but none that I would know without searching. My best guess would by that the number of people that have it is maybe 3% of users. But an analytics site will have the info, for sure. – Noon Silk Aug 15 '09 at 11:49
  • 3%? that's it? that sounds terribly low, the amount of vista users is higher than 3% and they have .net 3.0 installed automatically. Is there any good site to check these things out ? – vondip Aug 15 '09 at 11:56
  • Ah, well, shows how much I know :) I can't think of a good site, I'd just search. Alexa.com maybe? I don't know. – Noon Silk Aug 15 '09 at 12:11