反序列化复杂的JSON对象

我使用JavaScript.Serializer.Deserializer反序列化复杂的JSON对象，如下所示：

{
    "name": "rule 1",
    "enabled": true,
    "conditions": [{
        "type": "time",
        "time": "17:23:10",
        "days": "125"
    }, {
        "type": "sensor",
        "uid": "10.2.0.1",
        "setpoint1": 12,
        "setpoint2": 18,
        "criterion": 1
    }, {
        "type": "sensor",
        "uid": "10.3.0.1",
        "setpoint1": 12,
        "setpoint2": 18,
        "criterion": 2
    }],
    "actions": {
        "period": 100,
        "single": false,
        "act": [{
            "type": "on",
            "uid": "10.1.0.1"
        }, {
            "type": "sms",
            "message": "Hello World"
        }]
    }
}

我想将其转换为某些类，如下所示：

public class Rule
{
    public string name { get; set; }
    public bool enabled { get; set; }
    public List<Condition> conditions { get; set; }
    public List<Action> actions { get; set; }
}

public class Condition
{
    public string type { get; set; }
    public string uid { get; set; }
    public DateTime? time { get; set; }
    public string days { get; set; }
    public double setpoint1 { get; set; }
    public double setpoint2 { get; set; }
    public int criterion { get; set; }
}

public class Action
{
    public int period { get; set; }
    public bool single { get; set; }
    public List<Act> act { get; set; }
}

public class Act
{
    public string type { get; set; }
    public string uid { get; set; }
    public string message { get; set; }
}

反序列化代码段：

json = new JavaScriptSerializer();
Rule rule = (json.Deserialize<Rule>(jsonStr));

如果我简化Rule类声明conditions和actions简单strings，它工作正常。

但是，如果我使用上述类，则会引发异常：

无法将类型为“ System.String”的对象转换为类型为“ System.Collections.Generic.List`1 [IoTWebApplication.Condition]”