In order to use the Constant Contact SDK you have to follow these steps:

1. Add the CTCT.dll library to your references project.

2. Place your credentials in app.config file under the appSettings tag.

<add key="APIKey" value="APIkey"/>
<add key="RedirectURL" value="RedirectURL"/>

1. In the file you wish to use the SDK include the following code in your file:

using CTCT;
using CTCT.Components;
using CTCT.Components.Contacts;
using CTCT.Components.EmailCampaigns;
using CTCT.Exceptions;;

2. Get the access token

2.1) For windows forms

_accessToken = OAuth.AuthenticateFromWinProgram(ref state);

2.2) For web forms (this is just an example, the login actions is done at a button click)

protected void Page_Load(object sender, EventArgs e)
{
var code = HttpContext.Current.Request.QueryString["code"];
if (!string.IsNullOrWhiteSpace(code))
{
_accessToken = OAuth.GetAccessTokenByCodeForWebApplication(HttpContext.Current, code);
}
}

protected void ButtonLogin_Click(object sender, EventArgs e)
{
OAuth.AuthorizeFromWebApplication(HttpContext.Current, "ok");
}

3. Create a ConstantContact object

ConstantContact constantContact = new ConstantContact(_apiKey, _accessToken);

4. Use the functions of the SDK using the created object.

######Example for getting an contact

Contact contact = constantContact.GetContact(int contactId);