访问控制服务（ACS）Facebook Angkor:

string callbackURL = "https://demo.accesscontrol.windows.net";// 需要你注册你的移动应用访问服务wndows azure ACS

String FacebookURL = "https://www.facebook.com/dialog/oauth?client_id=" + Uri.EscapeDataString("402........") + "&redirect_uri=" + Uri.EscapeDataString(callbackURL) + "&scope=read_stream&display=popup&response_type=token";

System.Uri StartUri = new Uri(FacebookURL);
System.Uri EndUri = new Uri(callbackURL);

WebAuthenticationResult WebAuthenticationResult = await WebAuthenticationBroker.AuthenticateAsync(
WebAuthenticationOptions.None,
StartUri,
EndUri);
if (WebAuthenticationResult.ResponseStatus == WebAuthenticationStatus.Success)
{
this.tbToken.Text = WebAuthenticationResult.ResponseData.ToString();
}
else if (WebAuthenticationResult.ResponseStatus == WebAuthenticationStatus.ErrorHttp)
{
this.tbToken.Text = "HTTP Error returned by AuthenticateAsync() : " + WebAuthenticationResult.ResponseErrorDetail.ToString();
}
else
{
this.tbToken.Text = "Error returned by AuthenticateAsync() : " + WebAuthenticationResult.ResponseStatus.ToString();
}