javascript的fromCharCode可以用什么代替,该怎么解决

javascript的fromCharCode可以用什么代替outstr+String.fromCharCode(224|((c12)&15))像这句javascrip

javascript的fromCharCode可以用什么代替
outstr+=String.fromCharCode(224|((c>>12)&15));

像这句javascript怎么转成c#

[解决办法]
outstr += new string(new char[] { (char)(224|((c >> 12) & 15)) });