This is an OAuth sample program written in C# which explains how to authorize users and to update status with Twitter and Facebook.

• ASP.NET MVC4 (web application framework)
• Hammock (REST library)

OAuth authentication uses HTTP Redirect to switch from the services to your applicaiton. At this time, some domain name (except 'localhost') is needed.

Edit %SYSTEMROOT%\system32\drivers\etc\hosts file (as Administrator) and add below.

127.0.0.1       oauth.example.com

Then you can use oauth.example.com to access localhost.

https://dev.twitter.com/

Create an applicaiton and configure:

• Applicaiton Type: Read and Write

Copy Consumer key and Consumer secret from the application's Details page.

Edit ApplicaitonUrl, TwitterConsumerKey and TwitterConsumerSecret.

<add key="ApplicationUrl" value="http://oauth.example.com:55108"/>
<add key="TwitterConsumerKey" value="CONSUMER_KEY"/>
<add key="TwitterConsumerSecret" value="CONSUMER_SECRET"/>

:55108 is the port number of visual sutdio's debugging web server's. Set the right number or delete it.

https://develpers.facebook.com/

Create an application and configure:

• Web Site: http://oauth.example.com:55108 :55108 is the port number of visual sutdio's debugging web server's. Set the right number or delete it.

Copy App ID / API Key and Applicaiton Secret.

Edit ApplicaitonUrl, FacebookAppId and FacebookAppSecret.

<add key="ApplicationUrl" value="http://oauth.example.com:55108"/>
<add key="FacebookAppId" value="CONSUMER_KEY"/>
<add key="FacebookAppSecret" value="CONSUMER_SECRET"/>

:55108 is the port of visual sutdio's debugging web server's port. Set the right number or delete it.