public static void Main()
string input = "Hello World!";
var output = input.JavaScriptStringEncode();
Console.WriteLine("<script type=\"text/javascript\"> var msg = {0}; alert(msg); </script>", output);
output = input.JavaScriptStringEncode(true);
Console.WriteLine("<script type=\"text/javascript\"> var msg = {0}; alert(msg); </script>", output);