如何使用AspJson遍历集合？

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

using AspJson;

string jsonString = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";
var jsonObject = Json.Decode(jsonString);

foreach (var key in jsonObject.Keys)
{
    var value = jsonObject[key];
    Console.WriteLine($"Key: {key}, Value: {value}");
}

[
  {"name":"John", "age":30},
  {"name":"Anna", "age":22},
  {"name":"Matthew", "age":45}
]

using AspJson;

string jsonArrayString = "[{\"name\":\"John\",\"age\":30},{\"name\":\"Anna\",\"age\":22},{\"name\":\"Matthew\",\"age\":45}]";
var jsonArray = Json.Decode(jsonArrayString) as JsonObject[];

foreach (var item in jsonArray)
{
    foreach (var key in item.Keys)
    {
        var value = item[key];
        Console.WriteLine($"Key: {key}, Value: {value}");
    }
}

try
{
    var jsonObject = Json.Decode(jsonString);
}
catch (Exception ex)
{
    Console.WriteLine($"JSON 解析失败: {ex.Message}");
}

if (jsonObject.ContainsKey("someKey"))
{
    var value = jsonObject["someKey"];
}
else
{
    Console.WriteLine("键不存在");
}