Check if package is compatible with .net core
<p>I started programming with .NET Core and ASP.NET Core and after reading many Docs/Tutorials i still am not sure of how to realize if a Nuget-(Meta-)Package is comptabile/usable within my .NET-Core-App.</p>

<ol>
<li>How to check if a NuGet-Package is compatible with .NET Core.
E.g. the often recited <a href="https://www.nuget.org/packages/Newtonsoft.Json/" rel="noreferrer">Newtonsoft JSON</a>. Is it compatible/usable - and how to see this?</li>
<li>Is there a list of all the available .NET Core packages?</li>
</ol>

<p>(<a href="https://docs.microsoft.com/en-us/dotnet/articles/core/packages" rel="noreferrer">Like here</a> it lists a few </p>

<blockquote>
  <p>key NuGet packages for .NET Core</p>
</blockquote>

<p>). But since they say those are <code>"key"</code> packages i would assume there are more. But which?</p>