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Related Code

public static class UrlValidation
{
    public static bool IsValidUrl(string value)
    {
        StringValidation.IsRequired(value, "Validation.IsUrl's value can't be null or empty");

        string strRegex = "^(https?://)" +
                        "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" + //user@ 
                        @"(([0-9]{1,3}\.){3}[0-9]{1,3}" + // IP- 199.194.52.184 
                        "|" + // allows either IP or domain 
                        @"([0-9a-z_!~*'()-]+\.)*" + // tertiary domain(s)- www. 
                        @"([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." + // second level domain 
                        "[a-z]{2,6})" + // first level domain- .com or .museum 
                        "(:[0-9]{1,4})?" + // port number- :80 
                        "((/?)|" + // a slash isn't required if there is no file name 
                        "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";

        Regex re = new Regex(strRegex);

        return re.IsMatch(value);
    }
}

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