InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now. Learn more →
Top 3 C# Polyfill Projects
-
Nullable
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.
-
Sevalla
Deploy and host your apps and databases, now with $50 credit! Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!
-
-
IsExternalInit
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.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C# Polyfill discussion
C# Polyfill related posts
-
Why you use Nodejs and depends 95% on third party libraries which only last of a year or two and don't use something like asp.net which is maintained by Microsoft?
-
Where’s C# headed? - Mads Torgersen - NDC Copenhagen 2022
-
Is there a way to change my C# language version without editing the project file?
-
Making the case for rewriting .NET Framework apps in .NET 6?
-
Returning null vs TryX with out parameter
-
What's new in C# 11 - C# Guide
-
Ladies and gentlemen, C#. A package, you guessed it, for C#.
-
A note from our sponsor - InfluxDB
www.influxdata.com | 1 Sep 2025
Index
What are some of the best open-source Polyfill projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Nullable | 194 |
| 2 | Theraot | 162 |
| 3 | IsExternalInit | 111 |
Sponsored
Deploy and host your apps and databases, now with $50 credit!
Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!
sevalla.com