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Question
Saturday, August 28, 2010 10:41 PM
I copied some projects from VS 2010 and later incorporated them in a 2008 project. Now I get this warning. I can get around this warning by editing the project file with notepad and replacing 4.0 with 3.5. Is there a way to replace the ToolsVersion from within VS?
Kevin
All replies (6)
Monday, August 30, 2010 5:39 AM âś…Answered | 2 votes
Hi Kevin,
Do you have any concern of this method?
Downgrade conversion is not supported in the VS IDE, as the old version may have no idea of the new things happened in the new version. But for some specific case, editing project file(s) manually is the way.
Thanks.
Figo Fei
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Monday, August 30, 2010 2:44 PM
Thank you. I was afraind of that. But it isn't that big of a deal.
I developed an application using the latest (VS 2010, .NET 4.0) but there are some users that like the app but don't have .NET 4.0 and because of policies can't install it. So the only way I could provide them with these applications was to "downgrade". And for the functions that I used there was little or no difference in using .NET 3.5 and .NET 4.0.
Kevin
Thursday, December 30, 2010 8:56 AM
Hi Kevin,
Please note that you can also build for .Net 3.5, .Net 3.0 and .Net 2.0 using Visual Studio 2010. So there really is no need to go back to VS 2008 for these customers.
Regards,
Michael
http://jepsonsblog.blogspot.com
Thursday, December 30, 2010 3:06 PM
The problem was that I was using 2010 and I want other users who have not installed 2010 also to be able to use this project. They have not upgraded to 2010 yet.
Kevin
Kevin Burton
Tuesday, October 30, 2012 7:53 AM
Hello,
I am also facing this issue. Every time I try to build my solution there comes an error in output window "Project file contains ToolsVersion="4.0", which is not supported by this version of MSBuild. Treating the project as if it had ToolsVersion="3.5"."
Also I dont get ToolVersion as 4.0 in any of the project cs file. I have been trying to resolve it since long. Any help is very much appreciated.
Thanks
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Tuesday, October 30, 2012 12:02 PM
Hi Tiya,
This ToolsVersion is not in any of the .cs files, it's in the project files (.csproj). Edit the files themselves, easiest is using Notepad or Notepad++. You can also right click them and choose to edit them. Either way, you should edit the actual XML code that is in these .csproj files.