How can I upgrade multiple projects (same solution) that's targeting 3.5 to 4.0 in one go?
In one big solution we have about 100~ projects all targeting 3.5 and currently in VS.NET 2010. Now we want to upgrade it to .NET 4.0, do I have to go one by one and change their target? or is there any way to automate this process? When upgrading many projects and similar operation I usually use Find and replace in files. First I upgrade one project and diff the result, then I search and replace relevant parts in my .csproj files. The Target Framework Migrator extension works great. After you install it simply go to Tools -> Target Framework Migrator Yes. You will have to change them each to