How to Downgrade from Visual Studio 2012 Project to Visual Studio 2008

How to downgrade from Visual Studio 2012 project to Visual Studio 2008

Well 2012 is compatible with 2010, i am not sure this would work but i found this on how to go back from 2010 to 2008, hope it works for you with 2012 (Original Link):

1. Make back up of your .sln file

2. Open your VS 2010 .sln in notepad.

   It should look something like this:

   Microsoft Visual Studio Solution File, Format Version 11.00 
   # Visual Studio 2010  Project("{FAE04EC0-3 ......
   

3. Change the Version 11.0 to Version 10.0 and the Visual Studio 2010 to 2008

   It should look something like this:

   Microsoft Visual Studio Solution File, Format Version 10.00 
   # Visual Studio 2008  Project("{FAE04EC0-3 .....
   

Convert/downgrade visual studio 2015 solution file to 2013

Did you try this solution? Just try to change "Format Version" in first line of .sln file (Visual Studio 2012 has 12.00, so I assume 2013 is 13.00)

Is it possible to downgrade from Visual Studio 2012 to Visual Studio 2010?

As Henrick answers: you do not upgrade/downgrade VS installs, rather you install versions side by side.

You note two technologies that might be problematic:

1. EF Code First: this is supported from 4.1 (or was it 4.2?) which is supported against .NET 4.0 and VS2010. Providing your not using enum or geo/spatial data types (which require .NET 4.5) this should work, but you'll need to ensure you update to the EF5 NuGet package for .NET 4.

2. WebAPI: This is new in MVC4, which comes with VS2012, but is a separate install for .NET 4/VS2010.

Finally. While some project types with round trip between VS2012 and VS2010 SP1 (you need the service pack) it is not true for all project types. Details are on MSDN.

Downgrade C# Project from visual studio 2010 to visual studio 2008

When you say "can no longer run it"... what happens?

• the sln files are not compatible; you'll need different sln files for each VS version
• the csproj are mostly compatible, although you might see a "version 4 not recognised, using 3.5 instead" warning or two, which is usually fine
• the cs is compatible as long as you don't use dynamic or the other new language features

In most cases you can get away with just having a separate sln for VS2010. So just rename it to "Whatever_2010.sln", get your old "Whatever.sln" back from your source repository, and rename it to "Whatever_2008.sln".

How to convert Visual Studios 2013 project to Visual Studios 2010?

Open you solution file in notepad. Make 1 change, as stated in Converting VS2012 Solution to VS2010:

Replace "# Visual Studio 2013" with "# Visual Studio 2010" (without
quotes.)

http://social.msdn.microsoft.com/Forums/vstudio/en-US/ef97fa9c-b89b-4a89-8bda-03457dff9c61/how-to-downgrade-from-visual-studio-2012-project-to-vs-2010

How to downgrade from Visual Studio 2012 project to Visual Studio 2008

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