c# - Windows phone 8.1 can't reference System.Data

Question

I'm trying to create a windows phone 8.1 apllication which has access to a local Database. I want to handle the DB acess in a portable class library. For introduction I looked as this webpage: https://msdn.microsoft.com/de-de/library/windows/apps/hh202876(v=vs.105).aspx

But I can't even reference the required namespaces:

using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.ComponentModel;
using System.Collections.ObjectModel;

And also I can't add none of them as reference. Can someone tell me whats wrong

Answer 1

You can not use SqlClient in PCL projects because it is not built as a PCL and it is not cross platform. The Data namespace is unavailable in PCL projects and it is not listed here.

The following assemblies are available within a Portable Class Library project:

• mscorlib.dll
• System.dll
• System.Core.dll
• System.Xml.dll
• System.ComponentModel.Composition.dll
• System.Net.dll
• System.Runtime.Serialization.dll
• System.ServiceModel.dll
• System.Xml.Serialization.dll
• System.Windows.dll (from Silverlight)