SecondLevelDomain und TopLevelDomain aus URL extrahieren

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/// <summary> 
/// Gets the second level domain. 
/// </summary> 
/// <param name="uri">The URI.</param> 
/// <returns></returns> 
static string GetSecondLevelDomain(Uri uri) 
{ 
	string[] domains = uri.Host.Split(new char[] { '.' }); 
	return (domains[domains.Length - 2] + "." + domains[domains.Length - 1]); 
}