title: How to use the latest C# version in Xamarin Forms projects
body: <p>I have a <code>Xamarin Forms</code> application. I'd like to use the latest C# version in platform specific projects (i.e. Xamarin.iOS and Xamarin.Android). It looks like I can add <code>&lt;LangVersion&gt;latest&lt;/LangVersion&gt;</code> to the .csproj files. However, I'm not sure where to add it exactly. I see a lot of <code>PropertyGroup</code> tags in the project files (usually one for each simulator and release type). Do I need to add it to every <code>PropertyGroup</code>? I need the latest language version to be available when debugging and in production.</p>