ff-dotnet-server-sdk-async 1.8.2

.NET 5.0 This package targets .NET 5.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.1 This package targets .NET Framework 4.6.1. The package is compatible with this framework or higher. 
dotnet add package ff-dotnet-server-sdk-async --version 1.8.2
                    


                    

                
NuGet\Install-Package ff-dotnet-server-sdk-async -Version 1.8.2
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="ff-dotnet-server-sdk-async" Version="1.8.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="ff-dotnet-server-sdk-async" Version="1.8.2" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="ff-dotnet-server-sdk-async" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add ff-dotnet-server-sdk-async --version 1.8.2
                    


                    

                
#r "nuget: ff-dotnet-server-sdk-async, 1.8.2"
#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. 
#:package ff-dotnet-server-sdk-async@1.8.2
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=ff-dotnet-server-sdk-async&version=1.8.2
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=ff-dotnet-server-sdk-async&version=1.8.2
                    


                            Install as a Cake Tool

.NET SDK For Harness Feature Flags

Table of Contents

Intro Requirements Quickstart Further Reading Build Instructions

Intro

Use this README to get started with our Feature Flags (FF) SDK for .NET. This guide outlines the basics of getting started with the SDK and provides a full code sample for you to try out. This sample doesn’t include configuration options, for in depth steps and configuring the SDK, for example, disabling streaming or using our Relay Proxy, see the .NET SDK Reference.

For a sample FF .NET SDK project, see our test .NET project.

FeatureFlags

Requirements

The library is packaged as multi-target supporting net461,netstandard2.0, net5.0, net6.0, net7.0, and net8.0.

Build Requirements

If building from source you will need .Net 8.0.0 or newer (dotnet --version)<br>

Quickstart

To follow along with our test code sample, make sure you’ve:

Install the SDK

Add the sdk using dotnet

dotnet add package ff-dotnet-server-sdk

Code Sample

The following is a complete code example that you can use to test the harnessappdemodarkmode Flag you created on the Harness Platform. When you run the code it will:

  • Connect to the FF service.
  • Report the value of the Flag every 10 seconds until the connection is closed. Every time the harnessappdemodarkmode Flag is toggled on or off on the Harness Platform, the updated value is reported.
  • Close the SDK.
using System;
using System.Collections.Generic;
using io.harness.cfsdk.client.dto;
using io.harness.cfsdk.client.api;
using System.Threading;

namespace getting_started
{
    class Program
    {
        public static String apiKey = Environment.GetEnvironmentVariable("FF_API_KEY");
        public static String flagName = Environment.GetEnvironmentVariable("FF_FLAG_NAME") is string v && v.Length > 0 ? v : "harnessappdemodarkmode";

        static void Main(string[] args)
        {
            // Configure your logger
            var loggerFactory = new SerilogLoggerFactory(
                new LoggerConfiguration()
                    .MinimumLevel.Information()
                    .WriteTo.Console()
                    .CreateLogger());

            // Create a feature flag client
            CfClient.Instance.Initialize(apiKey, Config.Builder().LoggerFactory(loggerFactory).Build());
            var isInit = CfClient.Instance.WaitForInitialization(30000);
            if (!isInit)
            {
                Console.WriteLine("Failed to init the SDK within 30seconds");
            }

            // Create a target (different targets can get different results based on rules)
            Target target = Target.builder()
                            .Name("Harness_Target_1")
                            .Identifier("HT_1")
                            .Attributes(new Dictionary<string, string>(){{"email", "demo@harness.io"}})
                            .build();

           // Loop forever reporting the state of the flag
            while (true)
            {
                bool resultBool = CfClient.Instance.boolVariation(flagName, target, false);
                Console.WriteLine("Flag variation " + resultBool);
                Thread.Sleep(10 * 1000);
            }
        }
    }
}

Running the example

$ export FF_API_KEY=<your key here>
$ dotnet run --project examples/getting_started/

Running the example with Docker

If you don't have the right version of dotnet installed locally, or don't want to install the dependencies you can use docker to quickly get started

docker run -v $(pwd):/app -w /app -e FF_API_KEY=$FF_API_KEY mcr.microsoft.com/dotnet/sdk:8.0 dotnet run --framework net8.0 --project examples/getting_started/

Additional Reading

For further examples and config options, see the .NET SDK Reference.

For more information about Feature Flags, see our Feature Flags documentation.

Harness is a feature management platform that helps teams to build better software and to test features quicker.

Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  net6.0 is compatible.  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 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 is compatible.  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.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-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 was computed. 
.NET Framework net461 is compatible.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 is compatible.  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.

NuGet packages

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GitHub repositories

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Version Downloads Last Updated
1.8.2 320 8/6/2026
1.8.2-preview-1 112 8/6/2026
1.8.1 343 6/16/2026
1.8.0 123 6/16/2026

.NET Server SDK for Harness Feature Flag platform