[VS2008] [.NET 3.5] 如何解决 The imported project "C:WindowsMicrosoft.NETFrameworkv3.5Microsoft.CompactFramework.CSharp.targets" was not found

重新安装或者修复 NETCFv35PowerToys

https://download.microsoft.com/download/f/a/c/fac1342d-044d-4d88-ae97-d278ef697064/NETCFv35PowerToys.msi