I\'ve migrated a Lightswitch 2011 project to LS 2012. I start the compiled application by running \"vslshost.exe\". This works well using Windows 7 (32 and 64 Bit, but when
The .NET Framework 4.5 requires at least Windows Vista. See the official system requirements.
When using Visual Studio 2012, you have to be careful to target .NET 4.0 if you want the application to run on Windows XP, and some features will not be available (for example, C# 5.0 await/async require runtime support only available in .NET 4.5).