Converting VS2012 Solution to VS2010

Question

I m working in VB project with VS 2012 and after finish I try to add setup project   I didn t find it   because the Setup Project was discontinued after VS2010  so I switched to VS2010 but the problem is the project wont open and I get this message      The selected file is a solution file but was created by a newer   version of this application and cannot be opened    I tried this article   http   www codeproject com Tips 80953 Converting-VS2010-Solution-to-VS2008 and tried to convert from 2012 to 2010 but same message appears

User · Answer

I had a similar problem and none of the solutions above worked, so I went with an old standby that always works:

Rename the folder containing the project
Make a brand new project with the same name with 2010
Diff the two folders and->
Copy all source files directly
Ignore bin/debug/release etc
Diff the .csproj and copy over all lines that are relevant.
If the .sln file only has one project, ignore it. If it's complex, then diff it as well.

That almost always works if you've spent 10 minutes at it and can't get it.

Note that for similar problems with older versions (2008, 2005) you can usually get away with just changing the version in the .csproj and either changing the version in the .sln or discarding it, but this doesn't seem to work for 2013.

User · Answer

I also faced the similar problem  I googled but couldn t find the solution  So I tried on my own and here is my solution    Open you solution file in notepad  Make 2 changes   Replace  Format Version 12 00  with  Format Version 11 00   without quotes   Replace    Visual Studio 2012  with    Visual Studio 2010   without quotes     Hope this helps u as well

User · Answer

Solution of VS2010 is supported by VS2012  Solution of VS2012 isn t supported by VS2010 --  one-way upgrade only  VS2012 doesn t support setup projects  Find here more about VS2010 VS2012 compatibility  http   msdn microsoft com en-us library hh266747 v vs 110  aspx

User · Answer

Open the project file and not the solution  The project will be converted by the Wizard  and after converted  when you build the project  a new Solution will be generated as a VS2010 one

User · Answer

the simplest solution is     open your website in vs2013 and go to  Debug- WebsiteProperties  last option  a new window will open    in this window go to  Build  option and change  net framework version from 4 5 to 4 0     then select ok   note  this step will only work if your project does not have dependencies with vs2013      Now open your website in vs2010

User · Answer

Simple solution which worked for me    Install Vim editor for windows  Open VS 2012 project solution using Vim editor and modify the version targetting Visual studio solution 10  Open solution with Visual studio 2010   and continue with your work

User · Answer

Just to elaborate on Bhavin s excellent answer - editing the solution file works but you may still get the incompatible error  as David reported  if you had  NET 4 5 selected as the default  NET version in your VS2012 project and your VS2010 enviroment doesn t support that   To quickly fix that  open the VS2012  csproj file in a text editor and change the TargetFrameworkVersion down to 4 0  from 4 5   VS2010 will then happily load the  edited  solution and projects   You ll also have to edit an app config files that have references to  NET 4 5 in a similar way to allow them to run on a  NET 4 0 environment

[visual-studio-2010] Converting VS2012 Solution to VS2010

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