Subtext.Framework.BlogInfo.GetAlternateHostAlias C# (CSharp) Method

        public static string GetAlternateHostAlias(string host)
        {
            if (String.IsNullOrEmpty(host))
                throw new ArgumentException("Cannot get an alternative alias to a null host", "host");

            if (host.StartsWith("www.", StringComparison.CurrentCultureIgnoreCase))
                return StripWwwPrefixFromHost(host);
            else
                return "www." + host;
        }