Install the Windows WinRT SDK

The Windows WinRT SDK is available as a NuGet package at nuget.org.

The Localytics WinRT SDK is dependent on SQLite for Windows. Install either

Visual Studio Extension package for SQLite Windows Runtime (Windows 8.1) (sqlite-winrt81-3080803.vsix)
SQLite Windows Phone 8.1 (Windows 8.1) (sqlite-wp81-winrt-3080803.vsix)

with the Visual Studio Extension Manager by navigating to Tools > Extensions and Updates.

Note: You don't need to install the SQLite library if other dependencies you have already include it.

If you haven't already, install the NuGet Manager from nuget.org.
For each project that will be using Localytics, use the NuGet Manager to install the Localytics Windows SDK.
Note: You don't need to complete this step if another dependency includes the SQLite library.
Add a reference to the SQLite extension.
1. In Solution Explorer, right-click on your project.
2. Click Add > Reference > Windows (Phone) 8.1 > Extensions.
3. Check the box next to the appropriate SQLite extension.
To meet SQLite Extension requirements, go to the Visual Studio build configuration manager in the Configuration Properties menu of your solution's Properties window. Make sure a platform (ARM, x86, x64) is selected, because SQLite doesn't support the Any CPU platform option.