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There are some technologies like LINQ and WPF which are nice, but installation of .NET 3.5 is still slow procedure. It's important to understand - among Windows users how many of them have .NET 3.5 installed?
Is there any good up to date stats gathered about .NET Version availability/usage? I've searched a lot, but can't find.
Update: .NET version IS present in web-agent strings for FF and IE at least. So there SHOULD be somebody who have that information. Anyone with access to really large web-site logs?
Update 2: I also understand Vista means that user have 3.5, but XP is still dominating the market.
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Open Visual Studio Developer Command Prompt or Visual Studio Developer PowerShell and enter clrver . For .NET Framework 4.5 and later versions, don't use the Environment.Version property to detect the version of the CLR. Instead, query the registry as described in Detect .NET Framework 4.5 and later versions.
Click Start > Control Panel > Administrative Tools > Internet Information Services (IIS) Manager. On the left pane, expand the entry for Local Computer and click Web Service Extensions. Check that there is an item called ASP.NET v2. 0.50727 and that its status reads Allowed .
You can get the stats here: http://www.statowl.com/microsoft_dotnet.php
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Scott Wiltamuth's Visual Studio blog contains some data for 2005. Obviously won't help with 3.5 data, but may be a start.
I also found this from a forum post dated 2008:
For example, from analyzing website's logs I found that of all visitors who has Vista/XP/2000 only 51% have .NET 2.0 and only 13% have .NET 3.0
There seems to be a real shortage of valuable data like this. I was asked a week ago what percentage of Vista installations were 64-bit and all I could find was this article that basically said the data wasn't available.
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