Soenneker.Dictionaries.AsyncLazy

A thread-safe dictionary that lazily initializes values asynchronously with automatic disposal

A high-performance asynchronous lazy-loading dictionary in C#, designed to ensure only one factory execution per key while supporting concurrent access.

Installation

dotnet add package Soenneker.Dictionaries.AsyncLazy

Usage

Basic Example

var dictionary = new AsyncLazyDictionary<string, string>();

string result = await dictionary.Get("greeting", async () => {
    await Task.Delay(1000, token); // Simulate data fetching
    return "Hello, World!";
});

Console.WriteLine(result); // "Hello, World!"

Removing an Entry

await dictionary.Remove("greeting");

Proper Disposal

await dictionary.DisposeAsync();