AsyncResourcePool 1.2.0

.NET Standard 2.0 .NET Framework 4.7.2
Install-Package AsyncResourcePool -Version 1.2.0
dotnet add package AsyncResourcePool --version 1.2.0
<PackageReference Include="AsyncResourcePool" Version="1.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add AsyncResourcePool --version 1.2.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: AsyncResourcePool, 1.2.0"
#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 AsyncResourcePool as a Cake Addin
#addin nuget:?package=AsyncResourcePool&version=1.2.0

// Install AsyncResourcePool as a Cake Tool
#tool nuget:?package=AsyncResourcePool&version=1.2.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.


Thread-safe, non-blocking, managed pool of re-usable resources, with a specified minimum and optional maximum number of resources, and optional expiry time for resources to be cleaned up if not used for a time.


dotnet add package AsyncResourcePool


Behaviour of AsyncResourcePool can be specified using AsyncResourcePoolOptions.

Property Default Description
MinNumResources N/A The minimum number of resources that will be maintained by the pool. This number of resources will be created regardless of whether or not they are requested. If a resource is requested an allocated, an additional resource will be created to maintain the pool size.
MaxNumResources int.MaxValue The maximum number of resources that the pool is allowed to create.
ResourcesExpireAfter null If a resource is unused for this time, it will be dispsosed. If this causes the number of available resources to drop below the minimum, additional resources will be created to replace the disposed ones.
MaxNumResourceCreationAttempts 3 Maximum number of attempts for creating a resource before an exception is thrown and passed back to the requestor
ResourceCreationRetryInterval 1 second Amount of time to wait after a failed resource creation attempt before trying again

Example usage: Connection Pool for Snowflake Connector for .NET

  1. Define a ConnectionPool class which consumes AsyncResourcePool internally
public sealed class ConnectionPool
    private readonly IAsyncResourcePool<SnowflakeDbConnection> _resourcePool;

    public ConnectionPool(string connectionString)
        var connectionFactory = GetConnectionFactoryFunc(connectionString);

        var asyncResourcePoolOptions = new AsyncResourcePoolOptions(
            minNumResources: 20,
            resourcesExpireAfter: TimeSpan.FromMinutes(15));

        _resourcePool = new AsyncResourcePool<SnowflakeDbConnection>(connectionFactory, asyncResourcePoolOptions);

    public Task<ReusableResource<SnowflakeDbConnection>> Get(CancellationToken cancellationToken) => _resourcePool.Get(cancellationToken);

    public void Dispose() => _resourcePool.Dispose();

    private static Func<Task<SnowflakeDbConnection>> GetConnectionFactoryFunc(string connectionString)
        return async () =>
            var conn = new SnowflakeDbConnection
                ConnectionString = connectionString

            await conn.OpenAsync();

            return conn;
  1. Optionally register ConnectionPool as Singleton in dependency injection configuration
services.AddSingleton<ConnectionPool>(sp => new ConnectionPool(...));
  1. Consume ConnectionPool
public class ConnectionConsumer
    private readonly ConnectionPool _connectionPool;

    public ConnectionConsumer(ConnectionPool connectionPool) {
        _connectionPool = connectionPool;

    public async Task DoSomething(CancellationToken cancellationToken) {
        using (var reusableConnection = await _connectionPool.Get(cancellationToken)) {
            var connection = reusableConnection.Resource;
            // Do something with the connection
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
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last updated
1.2.0 34,306 4/20/2021
1.1.1 3,583 9/8/2020
1.1.0 261 9/8/2020
1.0.0 418 6/29/2019