Example on how to handle authenticating with LinkedIn using OAuth 2.0, and how to obtain the name and email address of the authenticated user.

LinkedInOAuth2.cshtml

@using Skybrud.Social.LinkedIn
@using Skybrud.Social.LinkedIn.ExtensionMethods
@using Skybrud.Social.LinkedIn.OAuth2
@using Skybrud.Social.LinkedIn.Responses.Users
@{
    
    <h2>LinkedIn: OAuth</h2>

    string baseUrl = "http://social-legacy.abjerner/linkedin/oauth2/";

    // Handle input
    string action = Request.QueryString["do"];
    string code = Request.QueryString["code"];
    string state = Request.QueryString["state"];

    // Initialize the OAuth client
    LinkedInOAuthClient oauth = new LinkedInOAuthClient {
        ClientId = "The client ID of your app",
        ClientSecret = "The client secret of your app",
        RedirectUri = baseUrl
    };

    if (action == "login") {

        // Redirect the user to the authentication page at LinkedIn.com
        Response.Redirect(oauth.GetAuthorizationUrl("bacon", "r_basicprofile", "r_emailaddress"));

    } else if (!String.IsNullOrWhiteSpace(code)) {

        LinkedInAccessTokenResponse token = oauth.GetAccessTokenFromAuthCode(code);
        oauth.AccessToken = token.AccessToken;

        DateTime expiresAt = DateTime.Now.AddSeconds(token.ExpiresIn.TotalSeconds);

        LinkedInService service = LinkedInService.CreateFromAccessToken(oauth.AccessToken);

        LinkedInGetUserResponse response = service.Users.GetUser("~", "id", "first-name", "last-name", "email-address");

        <table class="table details">
            <tr>
                <th>Expires in</th>
                <td>@token.ExpiresIn.TotalSeconds (~@token.ExpiresIn.TotalDays days &bull; @expiresAt.ToString("r"))
                </td>
            </tr>
            <tr>
                <th>Access Token</th>
                <td>@token.AccessToken</td>
            </tr>
        </table>

        <table class="table details">
            <tr>
                <th>ID</th>
                <td>@response.Body.Id</td>
            </tr>
            <tr>
                <th>Name</th>
                <td>@response.Body.FirstName @response.Body.LastName</td>
            </tr>
            <tr>
                <th>Email</th>
                <td>@response.Body.XElement.GetElementValue("email-address")</td>
            </tr>
        </table>

        <pre>@response.Body.XElement</pre>

        <br />

        <a href="@baseUrl?do=login" class="btn btn-primary">Login again</a>

    } else if (Request.QueryString["error"] != null) {

        <div class="alert alert-warning">
            <b>@Request.QueryString["error"]</b><br />@Request.QueryString["error_description"]
        </div>

        <a href="@baseUrl?do=login" class="btn btn-primary">Login with LinkedIn</a>

    } else {

        <a href="@baseUrl?do=login" class="btn btn-primary">Login with LinkedIn</a>

    }

}