.NET C# Library of bit.ly API for Windows 10, Windows 8.1, Winodws Phone 8.1
Example
//Password Authentication
BitLy client = new BitLy("CLIENT_ID", "CLIENT_SECRET", GrantType.Password, "username", "password");
AuthenticationInfo info = await client.GetAccessTokenAsync(); //Get Access Token
LinkInfo linfo = await client.GetUrlInfoAsync(info.AccessToken, "http://bit.ly/1RmnUT", "http://bit.ly/ze6poY" );
//Web-Flow Authentication
BitLy client = new BitLy("CLIENT_ID", "CLIENT_SECRET", "Redirect URL");
AuthenticationInfo info = await client.AuthorizeAsync() //Get Access Token, Use WebAuthenticatinBroker
LinkInfo linfo = await client.GetUrlInfoAsync(info.AccessToken, "http://bit.ly/1RmnUT", "http://bit.ly/ze6poY" );
All the Result Objects have the JsonString property if you need the json string returned from bit.ly