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SQL Server .NET Framework Prerequisite

Posted on 2011-02-24
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Last Modified: 2013-11-14
I am deploying .net framework 4.0 client, sql server 2008 r2 express along with my application.

SQL Server 2008 r2 has a minimum requirment of .net framework 3.5 sp1. But since i will be installing .net framework 4.0, do I still need to install .net framework 3.5?
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Question by:Thomasian
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by:Éric Moreau
Éric Moreau earned 100 total points
ID: 34976448
yes but it will automatically be installed with SQL server
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by:geowrian
geowrian earned 50 total points
ID: 34976451
The short answer is yes. .net 4.0 does not install the 3.5 components, so 3.5 applications will not run. You will need to install .Net 3.5 (and I recommend SP1 and all updates).
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Vadim Rapp earned 350 total points
ID: 34993864
I asked this question to Microsoft; here's the answer.

====================
Greetings from Microsoft Connect!

This notification was generated for feedback item: What .Net framework is necessary? (http://connect.microsoft.com/SQLServer/feedback/details/647124/what-net-framework-is-necessary) which you submitted at the Microsoft Connect (http://connect.microsoft.com) site.

Thank you for contacting us. If you will be installing SQL Server 2008 R2 Express, the database only packages, you can just install .NET 4.0. But it needs to be the full package, not the client profile. Any other Express package does require .NET 3.5 SP1. The minimum .NET frameworks requirement is misleading. This blog has some further details: http://blogs.msdn.com/b/sqlexpress/archive/2009/12/09/sql-server-express-and-net-4.aspx

=====================
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by:Thomasian
ID: 34993896
wow, thanks for that useful info!

That's what I though at first but not quite sure so I just decided to ask other experts.
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