http://blogs.msdn.com/b/danielvl/archive/2011/07/29/how-to-escape-curly-brackets-in-url-rewrite-rule.aspxThere is no escaping character in an URL Rewrite expression, but here is how you include curly bracket within an URL Rewrite expression. For opening { curly bracket you will always require to use the UrlDecode function to generate the { character fromen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)