how to switch frameworks

Posted on 2008-10-06
Last Modified: 2013-11-08
I am attempting to utilize WPF.  To do so, I need to use at the very least .net framework 3.0.  I have both 2.0, 3.0 and the 3.5 frameworks installed my my local machine.

I began a new project in visual studio 2005.  How do I ensure that either the framework of my choice is being used?  When I go to the references tab, it looks like it is utilizing .net framework 2.0 for all of its code libraries.
Question by:dchau12
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Expert Comment

by:Éric Moreau
ID: 22653584
this is correct. the core librairies of the .net framework remains version 2.0 (and even with the .Net framework of Visual Studio 2008)

Author Comment

ID: 22653743
does the framework automatically default to the latest framework?  Like, .net framework 3.0 is installed on my pc, and that framework is used for vs 2005.  When that version is installed, does it automatically pick it up?

Author Comment

ID: 22653913
let me reqord that.  Does visual studio automatically default to the latest framework?
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LVL 70

Expert Comment

by:Éric Moreau
ID: 22653940
there is one thing that you really need to understand: the .net framework 3.0 CANNOT exist/run/live without the .net framework 2.0.

the .net framework 2.0 is the core while the .net framework 3.0 are some extensions to the core (WCF, WPF, WF, Cardspace).

VS2005 always use the .net framework 2.0 and if you add one of the 4 extensions, it will add the required dlls (that are 3.0) to the references but you will always keep the 2.0 core files.

This is also true for the .net framework 3.5. The core files are still .net framework 2.0.

Author Comment

ID: 22654029
ok.... awesome... now I am really getting to what I need.

I have the 3.0 framework installed, and I want to use the WPF extension.  But, I do not believe that vs2005 is using the 3.0 framework because when I start a new project, WPF is not included in the list of project templates.  How do I get it in there?

LVL 70

Accepted Solution

Éric Moreau earned 500 total points
ID: 22654172
if you are serious about WPF, you should really switch to 3.5 (VS2008) as it was greatly enhanced.

I think you can still can the DLLs from

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