void RenewAccessToken(string packageSecurityIdentifier, string clientSecret)
{
var postData = new StringBuilder();
postData.AppendFormat("{0}={1}&", "grant_type", "client_credentials");
postData.AppendFormat("{0}={1}&", "client_id", HttpUtility.UrlEncode(packageSecurityIdentifier));
postData.AppendFormat("{0}={1}&", "client_secret", HttpUtility.UrlEncode(clientSecret));
postData.AppendFormat("{0}={1}", "scope", "notify.windows.com");
var wc = new WebClient();
wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
var response = string.Empty;
response = wc.UploadString("https://login.live.com/accesstoken.srf", postData.ToString());
OAuthToken oauthTok = OAuthToken.GetOAuthTokenFromJson(response);
if (oauthTok != null)
{
this.AccessToken = oauthTok.AccessToken;
this.TokenType = oauthTok.TokenType;
}
else
{
throw new UnauthorizedAccessException("Could not retrieve access token for the supplied Package Security Identifier (SID) and client secret");
}
}
