BlogDoFT.Libs.Flagr 10.1.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package BlogDoFT.Libs.Flagr --version 10.1.0
                    


                    

                
NuGet\Install-Package BlogDoFT.Libs.Flagr -Version 10.1.0
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="BlogDoFT.Libs.Flagr" Version="10.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="BlogDoFT.Libs.Flagr" Version="10.1.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="BlogDoFT.Libs.Flagr" />
                    


                            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 BlogDoFT.Libs.Flagr --version 10.1.0
                    


                    

                
#r "nuget: BlogDoFT.Libs.Flagr, 10.1.0"
#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. 
#:package BlogDoFT.Libs.Flagr@10.1.0
#: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=BlogDoFT.Libs.Flagr&version=10.1.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=BlogDoFT.Libs.Flagr&version=10.1.0
                    


                            Install as a Cake Tool

BlogDoFT.Libs.Flagr

HTTP client to evaluate feature flags from a Flagr server. Registers IFlagEvaluator (from BlogDoFT.Libs.Flagr.Abstractions) as a typed HttpClient and evaluates flags by posting to Flagr's v1/evaluation endpoint.

Purpose

  • Wire up a typed HttpClient pointed at a Flagr instance using IOptions<FlagrOptions>.
  • Resolve a feature flag's variant for a given entity context.

Configuration

{
  "Flagr": {
    "BaseUrl": "https://flagr.example.com/api/"
  }
}

Quick start

// Composition root
services.AddFlagr();

// or configure options in code
services.AddFlagr(options => options.BaseUrl = "https://flagr.example.com/api/");

public class MyFeature
{
    private readonly IFlagEvaluator _FlagEvaluator;

    public MyFeature(IFlagEvaluator FlagEvaluator)
    {
        _FlagEvaluator = FlagEvaluator;
    }

    public bool IsEnabled()
    {
        var evaluation = _FlagEvaluator.EvaluateFlag<MyFeature>(new { });
        return evaluation.VariantKey == "on";
    }
}

Notes

  • AddFlagr fails fast with an OptionsValidationException when Flagr:BaseUrl is missing or empty.
  • To authenticate requests to Flagr with a Keycloak-issued bearer token, add BlogDoFT.Libs.Keycloak and attach KeycloakAuthenticationHandler to the Flagr HttpClient via AddHttpMessageHandler<KeycloakAuthenticationHandler>().

Versioning

Starting with v10.0.0, this library's version numbering follows the major version of the .NET runtime it targets. For example, this version is compatible with .NET 10, so the major version is 10 — this explains the jump from the previous 1.x version series.

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  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. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
10.1.1 105 9/24/2026
10.1.0 98 9/14/2026
10.0.1 104 9/14/2026
10.0.0 106 9/13/2026
1.14.0 111 9/13/2026