Cysharp/ObservableCollections

Health v2 · maintenance only

Adoption not part of the score

1009 stars · 73 forks observed · 2026-08-28

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

A high-performance C# library providing generic observable collections (list, dictionary, hashset, queue, stack, ring buffers) with allocation-free change notifications and thread-safe synchronized views. Designed for building reactive Model-View bindings in WPF, Blazor, and Unity, with R3 integration.

Use cases

• replace ObservableCollection with a faster generic version in WPF
• bind collections to UI without boxing allocations
• create thread-safe synchronized views of a collection
• react to collection changes with R3 observables
• build MVVM data binding for Unity or Blazor
• observe sort and reverse operations on a list

When to choose

• you need high-performance, allocation-free collection change notifications in .NET
• you want thread-safe collections with synchronized views for WPF, Blazor, or Unity
• you use R3 and want reactive extensions over collections
• you need range add/remove or sort/reverse notifications

When to avoid

• you only need a simple, standard ObservableCollection with no performance concerns
• your project does not target .NET/C#
• you need collections for platforms outside WPF, Blazor, or Unity ecosystems

Facets

library · maturity active

state-management concurrency developer-tools cross-platform web-development dotnet windows cross-platform csharp observable-collections wpf blazor unity mvvm reactive r3 thread-safe synchronized-views

Member repositories

For agents

markdown · JSON · MCP: product_card(name="Cysharp/ObservableCollections")