.NET Standard 2.1 has 37,118 of the 37,118 available APIs.
| .NET implementation | Version support |
|---|---|
| .NET and .NET Core | 3.0, 3.1, 5.0, 6.0, 7.0 |
| .NET Framework 1 | N/A2 |
| Mono | 6.4 |
| Xamarin.iOS | 12.16 |
| Xamarin.Mac | 5.16 |
| Xamarin.Android | 10.0 |
| Universal Windows Platform | TBD |
| Unity | 2021.2 |
1 The versions listed for .NET Framework apply to .NET Core 2.0 SDK and later versions of the tooling. Older versions used a different mapping for .NET Standard 1.5 and higher. You can download tooling for .NET Core tools for Visual Studio 2015 if you cannot upgrade to Visual Studio 2017 or a later version.
2 .NET Framework doesn't support .NET Standard 2.1. For more information, see the announcement of .NET Standard 2.1.
For more information, see .NET Standard 2.1. For an interactive table, see .NET Standard versions.