问题
We started using VS 2010 and were very happy with it, so we converted our project into a 2010 solution (still .net 3.5) and continued our development in 2010. However, we are getting a lot of bugs recently and want to go back to 2008. The solution files have changed (new projects and files added everywhere), but everything is still in .net 3.5. I was wondering if there is an easy way to migrate back to 2008.
回答1:
Depending on if they kept the solution file structure similar between 2008 and 2010, you just need to create an empty solution file in 2008 and look at the top identifier line in it, and copy it into the other solution file.
I however doubt they kept it the same since they were integrating a number of features into solution files.
You would be better off to create a new blank solution in 2008 and use "Add existing project" to reimport them. As long as you dont have any custom "solution" wide references this will work (no solution folders, server setups, etc).
It is probably the fastest and most direct route.
回答2:
I had success changing the first 2 lines from:
Microsoft Visual Studio Solution File, Format Version 11.00
# Visual Studio 2010
to
Microsoft Visual Studio Solution File, Format Version 10.00
# Visual Studio 2008
回答3:
Assuming that your solution is under source control and the migration from VS 2008 to VS 2010 was the only change in that checkin, just compare the two version and see what's changed.
Then change the lines affected back to the VS 2008 version and you should be good to go.
There's no automatic process as Microsoft see this as a one way operation.
回答4:
You can manually edit .sln file in text editor. There is field named version, or like that, just change it from 10 to 9.
回答5:
This question
How does one convert a Visual Studio .NET 2008 solution to Visual Studio .NET 2005?
might also be applicable for converting from 2010 back to 2008.
回答6:
You can use "Project Converter": http://www.emmet-gray.com/Articles/ProjectConverter.htm
I have just found it. I am going to test it right now! :-)
回答7:
Please try the following (find first line and replace to second line to convert 2010 solution to 2008):
TargetFrameworkMoniker = ".NETFramework,Version=v2.0"
TargetFramework = "3.5"
# Visual Studio 10
# Visual Studio 2008
Microsoft Visual Studio Solution File, Format Version 11.00
Microsoft Visual Studio Solution File, Format Version 10.00
<Project ToolsVersion="4.0"
<Project ToolsVersion="3.5"
<ProductVersion>10.0.20506</ProductVersion>
<ProductVersion>9.0.30729</ProductVersion>
\VisualStudio\v10.0\
\VisualStudio\v9.0\
<Import Project="$(MSBuildToolsPath)\Workflow.Targets" />
<Import Project="$(MSBuildExtensionsPath)\Microsoft\Windows Workflow Foundation\v3.5\Workflow.Targets" />
This worked on my solutions, you can try to see if it fit to your cases.
回答8:
as maZZoo tells, you have to replace those lines in .sln, but if you check you Output panel you may have an alert of using ToolsVersion="4.0", you have to replace that in the .csproj to:
<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
来源：https://stackoverflow.com/questions/1898325/how-to-convert-a-vs-2010-solution-back-to-2008