DynamicDictionary Class

public class DynamicDictionary : DynamicDictionary<object>

dynamic obj = new DynamicDictionary
{
    ["name"] = "Alice",
    ["age"] = 30,
    ["isAdmin"] = true,
    ["address"] = new DynamicDictionary
    {
        ["city"] = "Xian",
        ["zip"] = "710000"
    }
};

// 属性形式取值，不区分大小写
Console.WriteLine($"name = {obj.name}");
Console.WriteLine($"NAME = {obj.NAME}");
Console.WriteLine($"age = {obj.Age}");
Console.WriteLine($"Address.City = {obj.Address.City}");

// 属性形式设置值，不区分大小写
obj.Age = 40;
Console.WriteLine($"age = {obj.age}");

try
{
    // 获取不存在的键值，会引发异常
    _ = obj.City;
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

// 设置不存在的键值，会自动添加之
obj.City = "Xian";
Console.WriteLine($"city = {obj.city}");

// 也是字典
IDictionary<string, object> realDict = obj as IDictionary<string, object>;
foreach (var item in realDict)
    Console.WriteLine($"{item.Key}: {item.Value}");
// 键不区分大小写
Console.WriteLine($"isAdmin = {realDict["isAdmin"]}");
Console.WriteLine($"ISADMIN = {realDict["ISADMIN"]}");
try
{
    // "AGE" 不可添加，已有 "age" 键
    realDict.Add("AGE", 50);
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

DynamicDictionary dynamicDict = new DynamicDictionary
{
    ["name"] = "Alice",
    ["age"] = 30,
    ["isAdmin"] = true
};
// 若是已知 DynamicDictionary，可这样转 dynamic 去使用属性
dynamic obj2 = dynamicDict;
Console.WriteLine($"name = {obj2.name}");
Console.WriteLine($"has AGE = {dynamicDict.ContainsKey("AGE")}");   // true
Console.WriteLine($"has City = {dynamicDict.ContainsKey("City")}"); // false