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sestoft/C5

C5 generic collection library for C#/.NET observed · 2026-08-28

github.com/sestoft/C5 · homepage · C# · MIT (permissive) observed · 2026-08-28

Health v2 · maintenance only

23/100

  • Activity 0
  • Release rhythm 8
  • Longevity 100
How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.

  • gap_med: n/a
  • age_days: 5619
  • days_rel: n/a
  • days_push: 727
  • n_releases_24m: 0

Full methodology

Adoption not part of the score

1068 stars · 177 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

C5 is a generic collection library for C# and other .NET/CLI languages, providing a wide range of classic data structures such as lists, sets, bags, dictionaries, priority queues, and updatable views. It emphasizes rich functionality, orthogonal interfaces, documented asymptotic performance, and a thoroughly tested implementation.

Use cases

  • need advanced data structures like priority queues or tree dictionaries in C#
  • want richer collection functionality than System.Collections.Generic
  • require updatable views or snapshots of collections
  • need guaranteed asymptotic time complexity for collection operations
  • looking for a well-tested alternative collection library for .NET
  • want a common interface across list-like collection implementations

When to choose

  • you need data structures or advanced features (views, snapshots, priority queue handles) missing from the standard .NET collections
  • you care about documented performance guarantees and orthogonality of collection interfaces
  • you work in C#, F#, or VB.NET on modern .NET runtimes

When to avoid

  • your needs are fully covered by System.Collections.Generic
  • you want a library with frequent updates and a large active community
  • you target platforms without generics-enabled .NET runtime support

Facets

library · maturity maintenance

developer-tools developer-tools programming-languages dotnet cross-platform collections data-structures csharp generic-collections priority-queue algorithms

1 source

Member repositories

RepositoryRoleHealth v2
sestoft/C5main23

For agents

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Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem