Sergio0694/PolySharp

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PolySharp provides generated, source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel. Add a reference, set your C# version to latest and have fun! 🚀

Stars: 2.2k
Forks: 72
Open beginner issues: 0
Indexed issues: 31

Dominant language: C#
License: MIT
Last GitHub push: May 25, 2026
Latest indexed: Sep 21, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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31 open issues indexed

`ExcludeFromCodeCoverageAttribute` usage not removed from `EmbeddedAttribute` Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

Sergio0694/PolySharp#145 · Opened Aug 2, 2026
CS8336: 'Microsoft.CodeAnalysis.EmbeddedAttribute' is reserved Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

Sergio0694/PolySharp#143 · 3 comments · 1 reaction · Opened May 29, 2026
Polyfill for union types Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

Sergio0694/PolySharp#139 · 12 reactions · Opened Apr 14, 2026
Support Type.IsAssignableTo(Type) Method Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

Sergio0694/PolySharp#138 · Opened Mar 18, 2026
Supports MonoDevelop.MSBuildEditor by creating a custom schema document. Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

Sergio0694/PolySharp#136 · Opened Dec 8, 2025
Consider setting LangVersion for down-level targets in PolySharp's .targets files Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Sergio0694/PolySharp#135 · Opened Nov 19, 2025
PolyFill Exception.Throw... methods using C# 14 static extension methods. Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

Sergio0694/PolySharp#132 · 2 comments · 7 reactions · Opened Oct 2, 2025
Support wildcards in <PolySharpIncludeGeneratedTypes> property Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Sergio0694/PolySharp#128 · Opened Jul 20, 2025
`required` properties not working with older compiler versions Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Sergio0694/PolySharp#123 · 1 comment · Opened Apr 14, 2025
Add Deconstruction extension methods for types which have added it Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Sergio0694/PolySharp#120 · 2 reactions · Opened Jan 31, 2025
PoloySharp blocked by windows path length (260) limit Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Sergio0694/PolySharp#109 · 1 comment · Opened Oct 14, 2024
Int128 and UInt128 Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Sergio0694/PolySharp#106 · Opened Sep 11, 2024
Show case of PolySharp benefits? Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

Sergio0694/PolySharp#105 · 3 comments · Opened Jul 26, 2024
How to adopt PolySharp to support sub arrays Open

Difficulty 3/5 Half a day Newbie friendliness 30/100

Sergio0694/PolySharp#104 · 8 comments · Opened Jul 26, 2024
Creating a Range indexer Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Sergio0694/PolySharp#101 · 4 reactions · Opened Apr 30, 2024
C# 12 need net8 sdk to be installed in Ubuntu 22.04, but success in Windows using visual studio 2022. Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

Sergio0694/PolySharp#99 · 1 comment · Opened Mar 6, 2024
Generate InAttribute for .NET Standard 1.0 Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

Sergio0694/PolySharp#97 · Opened Feb 10, 2024
System.Range not included in NetFramework 4.6.2 projects Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Sergio0694/PolySharp#96 · 4 comments · Opened Feb 1, 2024
GeneratedRegex attribute Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

Sergio0694/PolySharp#95 · 4 comments · 4 reactions · Opened Jan 30, 2024
Is it possible to use PolySharp on a github Ubuntu Runner ? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Sergio0694/PolySharp#94 · 7 comments · 1 reaction · Opened Dec 31, 2023
Support Range for non ValueTuple by remove the GetOffsetAndLength method Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Sergio0694/PolySharp#93 · 5 comments · Opened Dec 11, 2023
What's the purpose of adding `TypeForwardedTo` attributes? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Sergio0694/PolySharp#90 · 3 comments · Opened Nov 11, 2023
Add DataAnnnotation Attributes Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Sergio0694/PolySharp#85 · Opened Oct 17, 2023
Add `System.Collections.Generic.PriorityQueue<TElement, TPriority>` polyfill Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Sergio0694/PolySharp#79 · Opened Aug 2, 2023
Matrix of Supported Language Features Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

Sergio0694/PolySharp#76 · 5 comments · 3 reactions · Opened Jun 27, 2023
PolySharp.SourceGenerators.PolyfillGenerator is not generating files Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Sergio0694/PolySharp#74 · 3 comments · 2 reactions · Opened Jun 9, 2023
`UnreachableException` polyfill Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Sergio0694/PolySharp#60 · 1 comment · 10 reactions · Opened Feb 15, 2023
.Net Framework 3.5 and ValueTuple Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

Sergio0694/PolySharp#56 · Opened Jan 23, 2023
Documentation for unsupported, runtime-dependent features. Open

documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Sergio0694/PolySharp#47 · 12 comments · 4 reactions · Opened Jan 16, 2023
Update/fix XML docs for generated types Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Sergio0694/PolySharp#44 · 4 comments · 2 reactions · Opened Jan 16, 2023
Provide RepositoryBranch metadata for package, just like the other metadata Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Sergio0694/PolySharp#23 · Opened Nov 16, 2022

Sergio0694/PolySharp

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