Slyno.MVVMToolkit 4.1.0 

dotnet add package Slyno.MVVMToolkit --version 4.1.0
NuGet\Install-Package Slyno.MVVMToolkit -Version 4.1.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Slyno.MVVMToolkit" Version="4.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Slyno.MVVMToolkit --version 4.1.0
#r "nuget: Slyno.MVVMToolkit, 4.1.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install Slyno.MVVMToolkit as a Cake Addin
#addin nuget:?package=Slyno.MVVMToolkit&version=4.1.0

// Install Slyno.MVVMToolkit as a Cake Tool
#tool nuget:?package=Slyno.MVVMToolkit&version=4.1.0

Library to help with UWP applications.

Product Compatible and additional computed target framework versions.
Universal Windows Platform netcore50 is compatible. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
4.1.0 1,130 12/27/2016
4.0.2 931 12/27/2016
4.0.1 924 12/27/2016
4.0.0 910 12/27/2016
3.0.4 1,488 1/14/2016
3.0.3 1,221 12/21/2015
3.0.2 1,185 12/8/2015
3.0.1 1,186 12/7/2015
3.0.0 1,250 12/6/2015
2.3.0 1,527 4/25/2015
2.2.0 1,342 12/7/2014
2.1.0.1 1,020 10/10/2014
2.1.0 1,063 10/10/2014
2.0.0 1,072 8/16/2014
1.1.0 1,112 6/30/2014
1.0.0 1,246 6/30/2014

v4.1.0.0
     Added extensions for: Collection, Color, Dictionary, Enumerable.
     Added NotifyObject and NotifyCollection.
     Added RelayCommand and AsyncRelayCommand.

     v4.0.2.0
     Added Behaviors: Parallax, KeyUp, KeyDown, FullWindow, BindSelectedItems, BackgroundImageBrushFadeIn.
     Added Converters: NumberToNumberFormat, Lowercase, Uppercase.
     Removed EnterKeyUpBehavior, EnterKeyDownBehavior. Use KeyUp/KeyDown behaviors going forward.
     Removed ILogger, NullLogger, DebugLogger. Loggers are so easy to build, not needed here.
     Removed NullDialogService, DebugDialogService. Useless implementations.
     Bug fixes.

     v3.0.4.0
     Added ContentProperty to all Triggers so the Actions can be set directly in XAML.

     v3.0.3.0
     Added IEncryptionService and an implementation of it.

     v3.0.2.0
     Added TiltBehavior.

     v3.0.1.0
     Updated ImageLoadZoomToFitBehavior to not need the ScrollViewer passed to it.

     v3.0.0.0
     Updated to a UWP package.
     Added Behaviors, Triggers, and Actions.
     Added more Converters.
     Removed NotifyObject and RelayCommands in favor of Prism.
     Removed sealed from all classes.
     Please be aware that this update introduces breaking changes for those updating from pre 3.0.

     v2.3.0.0
     Updated IDialogService to contain the Async versions of showing.
     Added a number of converters.

     v2.2.0.0
     Removed INavigationService in favor of Prism.
     Updated IDialogService to not be async to work in catch blocks.
     Added ILogger for generic logging.
     Removed IExceptionService in favor of an ILogger.

     v2.1.0.1
     Added INavigationService, IDialogService, IExceptionService and
     default implementations for these.

     v2.0.0.0
     Added Converters.

     v1.1.0.0
     Updated for universal apps.

     v1.0.0.0
     Initial release.