前后台交互过程中json格式如何解析以及如何生成

$.ajax({ 
type: "POST", 
url: "GetMenuRole.ashx", 
data: "", 
dataType: "json", 
success: function (data) { 
if (data.Status == false) { 
alert(data.ErrorReason); 
} 
else { 
//解析这个菜单列表 
alert(data.MenuList); 
} 
}, 
error: function (data) { 
alert(data); 
} 
});

string sReturnJson = " <KH>\"Status\":\"{0}\",\"MenuList\":\"{1}\",\"ErrorReason\":\"{2}\"</KH>"; 
sReturnJson = string.Format(sReturnJson, "True", sReturnMenuList,string.Empty).Replace("<KH>","{").Replace("</KH>","}"); 
context.Response.Write(sReturnJson);