/// PhotoSearchOptions options = new PhotoSearchOptions();
/// options.Extras = PhotoSearchExtras.License & PhotoSearchExtras.OwnerName
///
///
/// GroupSearchResults results = flickr.GroupsSearch("test");
/// foreach(GroupSearchResult result in results.Groups)
/// {
/// Console.WriteLine(result.GroupName);
/// }
///
///
/// PhotoSearchExtras extras = PhotoSearchExtras.DateTaken & PhotoSearchExtras.IconServer;
/// string val = Utils.ExtrasToString(extras);
/// Console.WriteLine(val);
///
/// outputs: "date_taken,icon_server";
/// First, register the configuration section in the configSections section:
///<configSections>
/// <section name="flickrNet" type="FlickrNet.FlickrConfigurationManager,FlickrNet"/>
/// </configSections>
///
/// Next, include the following config section: ///
///
/// <flickrNet
/// apiKey="1234567890abc" // optional
/// secret="2134123" // optional
/// token="234234" // optional
/// cacheSize="1234" // optional, in bytes (defaults to 50 * 1024 * 1024 = 50MB)
/// cacheTimeout="[d.]HH:mm:ss" // optional, defaults to 1 day (1.00:00:00) - day component is optional
/// // e.g. 10 minutes = 00:10:00 or 1 hour = 01:00:00 or 2 days, 12 hours = 2.12:00:00
/// >
/// <proxy // proxy element is optional, but if included the attributes below are mandatory as mentioned
/// ipaddress="127.0.0.1" // mandatory
/// port="8000" // mandatory
/// username="username" // optional, but must have password if included
/// password="password" // optional, see username
/// domain="domain" // optional, used for Microsoft authenticated proxy servers
/// />
/// </flickrNet>
///
Nothing in VB.Net).
/// FlickrNet.Flickr flickr = new FlickrNet.Flickr();
/// User user = flickr.PeopleFindByEmail("cal@iamcal.com");
/// Console.WriteLine("User Id is " + u.UserId);
///
/// string frob = flickr.AuthGetFrob();
/// string url = flickr.AuthCalcUrl(frob, AuthLevel.Read);
///
/// // redirect the user to the url above and then wait till they have authenticated and return to the app.
///
/// Auth auth = flickr.AuthGetToken(frob);
///
/// // then store the auth.Token for later use.
/// string token = auth.Token;
///
///
/// XmlElement[] elements = flickr.TestEcho("¶m=value");
/// foreach(XmlElement element in elements)
/// {
/// if( element.Name = "method" )
/// Console.WriteLine("Method = " + element.InnerXml);
/// if( element.Name = "param" )
/// Console.WriteLine("Param = " + element.InnerXml);
/// }
///
///