Singulink.Collections

Generally useful collections that are missing from .NET, plus a companion package of weak reference collections. They are highly optimized for performance, well documented and follow the same design principles as built-in .NET collections so they should feel instantly familiar.

Packages

Singulink.Collections includes the following:

  • HashSetDictionary: Collection of keys mapped to a hash set of unique values per key (with AlternateLookup support).
  • ListDictionary: Collection of keys mapped to a list of values per key (with AlternateLookup support).
  • Map: Collection of two types of values that map between each other in a bidirectional one-to-one relationship (with AlternateLookup support).
  • EquatableArray / ComparerEquatableArray: Array wrappers that implement value equality semantics based on the contents of the array.
  • ReadOnlyHashSet: Fast direct read-only wrapper for HashSets (instead of going through ISet<> like ReadOnlySet does).
  • ReadOnlyList: Fast direct read-only wrapper for Lists (instead of going through IList<> like ReadOnlyCollection does).
  • A full set of interfaces for the new collections, including the keyed-collection family (IKeyedList, IKeyedSet, ...) that implements IGrouping<TKey, TValue> for natural LINQ interop, plus an IReadOnlySet<> polyfill for .NET Standard.

Singulink.Collections.Weak provides a set of collection classes that store weak references to values so that the garbage collector is free to reclaim the memory they use when they aren't being referenced anymore. The values returned by the collections will never be null - if the value was garbage collected then the collection behaves as if the value was removed from the collection.

The following collections are included in the package:

  • WeakList: Collection of weakly referenced values that maintains relative insertion order, is safe for concurrent use, and automatically removes values as they die.
  • WeakValueDictionary: Collection of keys and weakly referenced values (with AlternateLookup support).
Important

Singulink.Collections v4 and Singulink.Collections.Weak v3 contain breaking changes. See the v4 changes and migration guide and the v3 weak collections changes and migration guide on GitHub for details.

We are a small team of engineers and designers dedicated to building beautiful, functional and well-engineered software solutions. We offer very competitive rates as well as fixed-price contracts and welcome inquiries to discuss any custom development / project support needs you may have.

This package is part of our Singulink Libraries collection. Visit https://github.com/Singulink to see our full list of publicly available libraries and other open-source projects.

Installation

The packages are available on NuGet - simply install the Singulink.Collections and/or Singulink.Collections.Weak packages.

Supported Runtimes: Everywhere .NET Standard 2.0 is supported, including:

  • .NET
  • .NET Framework
  • Mono / Xamarin

End-of-life runtime versions that are no longer officially supported are not tested or supported by this library.

Here are some additional links to get you started:

  • API Documentation - Browse the fully documented API here.
  • Chat on Discord - Have questions or want to discuss the library? This is the place for all Singulink project discussions.
  • Github Repo - File issues, contribute pull requests or check out the code for yourself!