Question

I don’t know if maybe I have something installed incorrectly, but having made a C# Portable Class Library targeting .NET for Windows Store apps, .NET Framework 4.5, Silverlight 4 and higher, Windows Phone 7 and higher, I’m getting errors that System.Tuple is missing.

How could this be?

Answer 1

Tuple[<...>] doesn’t exist in Windows Phone 7, so you can’t use it if you are targeting that platform.

I’ve just validated, and if you create a PCL targeting:

• .NET for Windows Store apps
• .NET Framework 4.5
• Silverlight 4 and higher

but not “Windows Phone 7 and higher”, then it works fine and you can use Tuple[<...>].

For completeness, it also doesn’t exist if you include Xbox 360.