A source code only package which allows you to use .NET's nullable attributes in older target frameworks like .NET Standard 2.0 or the "old" .NET Framework.

Backporting .NET and more: LINQ expressions in .net 2.0 - nuget Theraot.Core available.

A source code only package which allows you to use C# 9's init and record features in older target frameworks like .NET Standard 2.0 or the "old" .NET Framework by providing a polyfill for the IsExternalInit class.

.NET polyfill to the future. A versatile RAD framework for .NET platform.

Polyfills for projects targeting older versions of .NET

Type and Reflection polyfill extension methods. .NET 3.5+ and .NET Standard 1.0+.

C# polyfills, your way

A micro-library that backports/polyfills .NET 9.0+'s System.Threading.Lock to prior versions (from .NET Standard 2.0 up to .NET 8.0), providing as much similar functionality as possible. Optionally works as a source generator.

Auto generate anything

Madness embraces your project by including compatibility layer for selected APIs normally not available on .NET Framework target.

C# code bits of internal implementations that are shared in projects. Meant to be used alongside Absence.Fody.

[ARCHIVED] Polyfills for Umbraco packages multi-targeting both v8 and v9

Set of polyfills for ord .NET Framework.

Adds C# 9/10's record/record struct support for .NET Framework 2, 3, and 3.5.

A complete port of Mono's System.Net.Http assembly to .NET 3.5

A source code package which makes StringSyntaxAttribute available to target frameworks older than .NET 7.

A polyfill-like package that is focused on making it easier to work around missing features, rather than provide hacky attempts at implementing them.