DotNetOpenAuth/DotNetOpenAuth

Health v2 · maintenance only

Flags: no_releases archived no_license

Adoption not part of the score

1716 stars · 718 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

DotNetOpenAuth is a C# library implementing the OpenID and OAuth protocols for .NET applications. It lets developers build both Identity Providers and Relying Parties (consumers), supporting OpenID 1.x/2.0 and OAuth 1.0/1.0a/2.0.

Use cases

• add OpenID login to an ASP.NET website
• implement an OAuth authorization server in C#
• build an OAuth client for a .NET desktop or web app
• host an OpenID provider so users get their own OpenIDs
• integrate federated identity into legacy ASP.NET WebForms or MVC apps

When to choose

• you maintain a legacy .NET Framework / ASP.NET application needing OpenID or OAuth 1.0/2.0 support
• you need to act as both an OpenID provider and relying party in C#
• you need fine-grained control over OpenID extensions like Attribute Exchange or PAPE

When to avoid

• you are starting a new .NET project - prefer modern libraries like ASP.NET Core authentication handlers or IdentityServer/OpenIddict
• you need active maintenance and recent security patches - the last release was in 2018
• you target .NET Core/.NET 5+ rather than the classic .NET Framework

Facets

library · maturity maintenance

auth authorization security security web-development apis dotnet windows openid oauth identity-provider csharp aspnet legacy web-server

Member repositories

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