Failed to display route on map in JavaScript

Hello,

I encountered the following problem when used Route.getDirections in JavaScript. Directions object could not properly deserialize the JSON output from route.ashx. The problem is that even i have en-US culture for IIS application GeoStream still serializes LatLon objects with 'comma' as digit separator. E.g.
{_class:{_ref:331},_length:4,_values:"34,054442,-118,210925;34,054374,-118,210608;34,054279,-118,21023;34,054215,-118,209721;"}
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Here is the problematic part of route.ashx output (look at the end of the document where points array located):

points_cache:{_class:{_ref:4},_length:86,_values:"34,056977,-118,185937;34,057017,-118,185787;34,056518,-118,185653;34,056625,-118,185173;34,056768,-118,184665;34,056982,-118,184026;34,057253,-118,183442;34,057285,-118,18338;34,057812,-118,182257;34,058223,-118,181354;34,059348,-118,178954;34,059697,-118,178189;34,060486,-118,176531;34,06102,-118,175323;34,061144,-118,175013;34,061211,-118,174914;34,061343,-118,174798;34,061343,-118,174565;34,061335,-118,174332;34,061323,-118,174242;34,061272,-118,174063;34,061217,-118,17394;34,06149,-118,173344;34,061639,-118,173001;34,061773,-118,172705;34,061966,-118,172297;34,062208,-118,171771;34,062355,-118,17151;34,062406,-118,171433;34,062337,-118,171412;34,062237,-118,171378;34,0622,-118,171363;34,06214,-118,171343;34,062078,-118,171321;34,062034,-118,171303;34,06195,-118,171268;34,061899,-118,17125;34,06166,-118,171162;34,061233,-118,171024;34,061179,-118,171008;34,061067,-118,170973;34,060953,-118,170943;34,06092,-118,17093;34,060875,-118,170914;34,060912,-118,170674;34,060975,-118,170293;34,060993,-118,17009;34,060959,-118,169609;34,060912,-118,169285;34,060814,-118,168653;34,060684,-118,167842;34,060591,-118,167465;34,060448,-118,167123;34,060387,-118,167075;34,060319,-118,166935;34,059927,-118,166002;34,059927,-118,165938;34,059843,-118,165757;34,059828,-118,16572;34,059719,-118,165374;34,059695,-118,165233;34,059689,-118,16496;34,059691,-118,164924;34,059705,-118,164689;34,059769,-118,164414;34,059891,-118,164138;34,059974,-118,163993;34,060154,-118,163748;34,060619,-118,163243;34,060757,-118,163102;34,061208,-118,162506;34,061995,-118,161272;34,062162,-118,161021;34,062443,-118,160629;34,062516,-118,160536;34,062591,-118,160444;34,062988,-118,160011;34,063483,-118,159508;34,063635,-118,159319;34,064077,-118,158549;34,064565,-118,157619;34,064936,-118,156893;34,064871,-118,156848;34,064547,-118,156654;34,064758,-118,156256;34,064745,-118,156249;"}},error:null,id:5}')