LinkedIn APIs for .NET

Startup.cs

public void ConfigureAuth(IAppBuilder app)
{
  // ... 
  var linkedInOptions = new LinkedInAuthenticationOptions();

  linkedInOptions.ClientId = "Your LinkedIn API Key";
  linkedInOptions.ClientSecret = "Your LinkedIn Secret Key";

  linkedInOptions.Scope.Add("r_fullprofile");

  linkedInOptions.Provider = new LinkedInAuthenticationProvider()
  {
    OnAuthenticated = async context =>
    {
      context.Identity.AddClaim(new System.Security.Claims.Claim("LinkedIn_AccessToken", context.AccessToken));
    }
  };

  linkedInOptions.SignInAsAuthenticationType = DefaultAuthenticationTypes.ExternalCookie;

  app.UseLinkedInAuthentication(linkedInOptions);
  // ...
}