Narvalo.Core 0.23.0 

dotnet add package Narvalo.Core --version 0.23.0
NuGet\Install-Package Narvalo.Core -Version 0.23.0
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="Narvalo.Core" Version="0.23.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Narvalo.Core --version 0.23.0
#r "nuget: Narvalo.Core, 0.23.0"
#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 Narvalo.Core as a Cake Addin
#addin nuget:?package=Narvalo.Core&version=0.23.0

// Install Narvalo.Core as a Cake Tool
#tool nuget:?package=Narvalo.Core&version=0.23.0

This package features implementations of some of the usual suspects from functional programming: Option (Maybe<T>) and Error (Output<T>) monads, simple pattern matching (Either<T1, T2>, Switch<T1, T2>), generators and delegate extensions. It also provides a few Code Contracts helpers.

     This is a portable class library targeting Profile259. The behaviour is 100% identical across all supported platforms; this is achieved without making use of the bait and switch PCL trick.

     This library fully passes FxCop, Gendarme and Code Contracts static analysis.

     A code contracts reference assembly is also included if you need it.

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
0.23.0 115 3/26/2015
0.22.1 38 3/24/2015
0.22.0 46 3/23/2015
0.21.0 62 2/20/2015
0.20.0 39 2/19/2015
0.19.1 66 12/17/2014
0.19.0 55 12/13/2014

See https://github.com/chtoucas/Narvalo.NET/blob/master/Changelog.md