public string Serialize()
{
string xml = "";
if (threatMetrixSessionId != null) xml += "\r\n<threatMetrixSessionId>" + SecurityElement.Escape(threatMetrixSessionId) + "</threatMetrixSessionId>";
if (customAttribute1Set) xml += "\r\n<customAttribute1>" + SecurityElement.Escape(customAttribute1Field) + "</customAttribute1>";
if (customAttribute2Set) xml += "\r\n<customAttribute2>" + SecurityElement.Escape(customAttribute2Field) + "</customAttribute2>";
if (customAttribute3Set) xml += "\r\n<customAttribute3>" + SecurityElement.Escape(customAttribute3Field) + "</customAttribute3>";
if (customAttribute4Set) xml += "\r\n<customAttribute4>" + SecurityElement.Escape(customAttribute4Field) + "</customAttribute4>";
if (customAttribute5Set) xml += "\r\n<customAttribute5>" + SecurityElement.Escape(customAttribute5Field) + "</customAttribute5>";
return xml;
}