asp.net 后台怎么解析json? 简单例子，帮忙看看

[PCHWBANK]

<script language="JavaScript" type="text/javascript">
var d = {"msg":[{"user":"llinzzi","msg":"你好"},{"user":"Huanhuan","msg":"嘿嘿"}],"type":"test"};
alert(d.type);
alert(d.msg[0].msg);
alert(d.msg.length);
for (var o in d){
alert(d[o]);
}
</script>
后台怎么办？

[cat_hsfz]

用MS AJAX(原Atlas)吧，他自带JSON双向转换工具。