Lea 1.4.0

dotnet add package Lea --version 1.4.0
NuGet\Install-Package Lea -Version 1.4.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Lea" Version="1.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Lea --version 1.4.0
#r "nuget: Lea, 1.4.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Lea as a Cake Addin
#addin nuget:?package=Lea&version=1.4.0

// Install Lea as a Cake Tool
#tool nuget:?package=Lea&version=1.4.0

Lite Event Aggregator (Lea)

Lea is an implementation of the event aggregator pattern which decouples event senders and consumers. Consuming classes subscribe to events by registering handler methods. Lea supports both synchronous and asynchronous handlers.


private void MyEventHandler(MyEvent evt)
  // handling code here

private async Task AsyncMyEventHandler(MyEvent evt)
  // handling code here

The handler is called by EventAggregator whenever the MyEvent event is published:

  eventAggregator.Publish(new MyEvent());

Events must be classes that implement the Lea.IEvent interface. There are no other restrictions on the event class implementation.

public class MyEvent : IEvent
  public string Value { get; set; }

Lea keeps only weak references to handlers so will not prevent garbage collection of any object with a method registered as a handler.

Handler methods may be unsubscribed to stop receiveing events either by passing the method delegate or the token object returned when subscribed to EventAggregator.Unsubscribe(). If the handler method goes out of scope and its containing object is garbage collected, EventAggregator will clean itself up and automatically remove the missing subscription.

  var myEventHandlerToken = eventAggregactor.Subscribe<MyEvent>(MyEventHandler);
  var asyncMyEventHandlerToken = eventAggregactor.Subscribe<MyEvent>(AsyncMyEventHandler);


  eventAggregator.Unsubscribe<MyEvent>(myEventHandlerToken);  // unsub with token
  eventAggregator.Unsubscribe<MyEvent>(AsyncMyEventHandler);  // unsub with delegate

Lea is thread-safe, supporting recursive reads.

Product Compatible and additional computed target framework versions.
.NET net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Lea:

Package Downloads

A library for working with Dorico's remote control API

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Version Downloads Last updated
1.4.0 154 1/2/2024
1.3.0 169 12/3/2023
1.2.0 96 11/24/2023
1.1.0 93 11/23/2023
1.0.0 81 11/20/2023

Added support for specifying thread subscribed handler runs on.