Static Server boolean validateURL(URL    _url)
{
    Boolean   xppBool;
    System.Boolean netBool;
    Str matchURLPattern = "^(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_!~*'().;?:@&=+$,%#-]+)+/?)$";
    System.Text.RegularExpressions.Match myMatch;
    new InteropPermission(InteropKind::ClrInterop).assert();
    myMatch = System.Text.RegularExpressions.Regex::Match(_url,matchURLPattern);
    netBool = myMatch.get_Success();
    xppBool = netBool;
    CodeAccessPermission::revertAssert();
    Return xppBool;

}