Top 20 NuGet oauth2 Packages

OpenID Connect & OAuth 2.0 client library
OpenID Connect and OAuth 2.0 Framework for ASP.NET Core
ASP.NET Core Identity Integration for IdentityServer4
EntityFramework persistence layer for IdentityServer4
ASP.NET Core authentication handler to validate JWT and reference tokens from IdentityServer4
Auth0 .NET SDK
ASP.NET Core 2.0 Middleware for validating tokens using OAuth 2.0 introspection
Auth0 .NET SDK
Auth0 .NET SDK
Package Description
Chilkat .NET Class Library (64-bit) for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
Chilkat .NET Core Class Library
Adds OAuth2 Providers for use in ServiceStack Web and REST Services. Includes built-in support for Google and LinkedIn OAuth2 providers. More Info on Auth Providers: http://docs.servicestack.net/authentication-and-authorization
Chilkat .NET Class Library (32-bit) for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...
IdentityServer is a framework and a hostable component that allows implementing single sign-on and access control for modern web applications and APIs using protocols like OpenID Connect and OAuth2. It supports a wide range of clients like mobile, web, SPAs and desktop applications and is extensible...
EntityFramework persistence layer for IdentityServer4
Storage interfaces and models for IdentityServer4
.NetStandard library for accessing easily Azure AD/B2C secured API's via Oauth2 and getting information via the Graph Api
IPP .NET SDK for OAuth2 is a set of .NET classes that make it easier to make Oauth2 calls. Refer more details on the lib dependencies here- .Net Framework 4.6.1 Newtonsoft.Json (>=11.0.2)
Client library of Thinktecture.IdentityModel. Includes OAuth2 and OpenID Connect client and helpers for parsing token and authorize responses, Epoch Time helpers, extensions methods for HttpClient.