Microsoft.Bcl.AsyncInterfaces 10.0.0-preview.5.25277.101

Prefix Reserved
.NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher.
This is a prerelease version of Microsoft.Bcl.AsyncInterfaces. 
dotnet add package Microsoft.Bcl.AsyncInterfaces --version 10.0.0-preview.5.25277.101                

                    
                

            
NuGet\Install-Package Microsoft.Bcl.AsyncInterfaces -Version 10.0.0-preview.5.25277.101
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="Microsoft.Bcl.AsyncInterfaces" Version="10.0.0-preview.5.25277.101" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Microsoft.Bcl.AsyncInterfaces --version 10.0.0-preview.5.25277.101                

                    
                

            
#r "nuget: Microsoft.Bcl.AsyncInterfaces, 10.0.0-preview.5.25277.101"
#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 Microsoft.Bcl.AsyncInterfaces as a Cake Addin
#addin nuget:?package=Microsoft.Bcl.AsyncInterfaces&version=10.0.0-preview.5.25277.101&prerelease

// Install Microsoft.Bcl.AsyncInterfaces as a Cake Tool
#tool nuget:?package=Microsoft.Bcl.AsyncInterfaces&version=10.0.0-preview.5.25277.101&prerelease

About

As of C# 8, the C# language has support for producing and consuming asynchronous iterators. The library types in support of those features are available in .NET Core 3.0 and newer as well as in .NET Standard 2.1. This library provides the necessary definitions of those types to support these language features on .NET Framework and on .NET Standard 2.0. This library is not necessary nor recommended when targeting versions of .NET that include the relevant support.

Key Features

  • Enables the use of C# async iterators on older .NET platforms

How to Use

using System;
using System.Collections.Generic;
using System.Threading.Tasks;

internal static class Program
{
    private static async Task Main()
    {
        Console.WriteLine("Starting...");
        await foreach (var value in GetValuesAsync())
        {
            Console.WriteLine(value);
        }
        Console.WriteLine("Finished!");

        static async IAsyncEnumerable<int> GetValuesAsync()
        {
            for (int i = 0; i < 10; i++)
            {
                await Task.Delay(TimeSpan.FromSeconds(1));
                yield return i;
            }
        }
    }
}

Main Types

The main types provided by this library are:

  • IAsyncEnumerable<T>
  • IAsyncEnumerator<T>
  • IAsyncDisposable<T>

Additional Documentation

Feedback & Contributing

Microsoft.Bcl.AsyncInterfaces is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  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. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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Version Downloads Last updated
10.0.0-preview.5.25277.101 0 5/29/2025
10.0.0-preview.4.25255.103 0 5/12/2025

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