BidirectionalMap 1.0.0

.NET Standard 1.6
Install-Package BidirectionalMap -Version 1.0.0
dotnet add package BidirectionalMap --version 1.0.0
<PackageReference Include="BidirectionalMap" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add BidirectionalMap --version 1.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: BidirectionalMap, 1.0.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install BidirectionalMap as a Cake Addin
#addin nuget:?package=BidirectionalMap&version=1.0.0

// Install BidirectionalMap as a Cake Tool
#tool nuget:?package=BidirectionalMap&version=1.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Bidirectional Map

.NET Core

Exactly what it sounds like. This library offers a single class BiMap that let's you define a two-way one-to-one map between values the same way you would define a one-way map with a dictionary.


using BidirectionalMap;

BiMap<int, string> map = new BiMap<int, string>(){
	{1, "Circle"},
	{2, "Triangle"},
	{3, "Square"},

var mappedString = map.Forward[1]; //"Circle"
var mappedInt = map.Reverse["Circle"]; // 1

It isn't limited to value types

BiMap<int, Action> map = new BiMap<int, string>(){
	{1, () => /* do something*/},

var action = map.Forward[1]; 


Well, table-driven value mapping is a very powerfull technique that makes conversions more readable, easier to update, and easier to load from non-code sources.
Some common scenarios for this kind of technique include

  • Mapping to some kind of storage (say, converting between enum and string)
  • Mapping display values to and from requests
  • Wrapping other code (adapter-style) to consume the api on your own terms
  • Choosing an action or configuration based on some kind of type value (this is usually just one-way though)


Will be available as a nuget package... pending upload


Feel free to open an issue to start the conversation.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
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Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
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Version Downloads Last updated
1.0.0 9,910 4/24/2020