Full featured timer class for UWP.
Open the Nuget Package Manager console and enter this command: Install-Package UltraTimer.ColinKiama
or...
In a a Universal Windows Project, go to Tools > NuGet Package Manager > Manage NuGet Packages for Solution then on the "Browse" section, search for "UltraTimer.ColinKiama". Then you can install the package for each project you want to use in your current solution.