LatestLangVersion 1.0.0

LatestLangVersion

Upgrade all your projects to the latest C# version, the lazy way.

PM:

Get-Project -All | Install-Package LatestLangVersion

dotnet cli (using PowerShell):

Get-ChildItem *.csproj -Recurse | ForEach-Object { dotnet add $_ package LatestLangVersion }

About

C# 7 is the first C# release where Microsoft started doing minor releases (7.1, 7.2, 7.3). However all new projects are still configured to use C# 7.0 (the latest major version).

Okay how do I get them?

Well you probably already have them installed.

Then why can't I use new C# features in my code?

Minor releases are opt-in.

How does this thing work then?

When you install this package into a project, a little chunk of MSBuild stuff is added to your project.

<PropertyGroup>
  <LangVersion>latest</LangVersion>
</PropertyGroup>

This is the opt-in part that lets you use whatever latest C# version you have installed. When you uninstall this package from a project, the project will revert to using the default version.

Why should I use this?

Because you can use the NuGet package manager UI in Visual Studio to quickly upgrade a large solution.

Why should I use this instead of Directory.build.props?

Because directory-wide build.props don't offer the same control over which projects get upgraded or not.