This function probes whether there is a handler for the provided URL on the system. For example, if you call this function with "tel://555-123-1234" on an iPhone, this will return true, but will return false on an iPod Touch.

This function does not validate the URL, it merely checks whether a handler for this URL has been installed on the system.

If you want to define your own URL handlers, edit your Info.plist file and define a new URL type, you then must update your UIApplicationDelegate.FinishedLaunching(UIApplication, Foundation.NSDictionary) method (to handle launching the application if it is not already running) and override the UIApplicationDelegate.OpenUrl method to handle the request to open the URL.