我已经创建了一个动态对象，并在运行时使用ExpandoObject为其设置属性和值。
dynamic parentDynamic = new ExpandoObject();
var parentName = "GroupOne";
((IDictionary<String, Object>)parentDynamic)[parentName] = "default";
Console.WriteLine(parentDynamic.GroupOne);
控制台将按预期成功输出“默认”。
我还以相同的方式创建了具有多个属性的子对象
dynamic childDynamic = new ExpandoObject();
var childProperty1 = "FirstName";
var childProperty2 = "LastName";
var childProperty3 = "Occupation";
((IDictionary<String, Object>)childDynamic)[childProperty1] = "John";
((IDictionary<String, Object>)childDynamic)[childProperty2] = "Smith";
((IDictionary<String, Object>)childDynamic)[childProperty3] = "Plumber";
Console.WriteLine(childDynamic.Occupation);
控制台成功按预期输出“管道工”。
当我尝试将childDynamic对象添加到parentDynamic对象并在运行时给它命名时，就会遇到麻烦。这是我最近的失败尝试：
var childName = "ChildOne";
((IDictionary<String, Object>)((IDictionary<String, Object>)parentDynamic)[parentName])[childName] = childDynamic;
Console.Write(parentDynamic.GroupOne.ChildOne.Occupation);
我在尝试分配时遇到的错误是：无法将类型为“ System.String”的对象转换为类型为“ System.Collections.Generic.IDictionary`2 [System.String，System.Object]”。
本质上，我希望能够访问parentDynamic.GroupOne.ChildOne.Occupation并返回“ Plumber”或parentDynamic.GroupOne.ChildOne.FirstName并返回“ John”
本来我想像这样一次完成所有作业
parentDynamic["GroupOne"]["ChildOne"]["Occupation"] = "Plumber"
但是我收到错误消息：无法将[]的索引应用于类型为'System.Dynamic.ExpandoObject'的表达式，这就是为什么我沿着创建父对象和子对象并将其首先转换为Dictionary对象的原因走的原因。理想情况下，我想像上面那样做，因为它更简单。
为了能够使用parentDynamic.GroupOne.ChildOne语法，GroupOne属性（ExpandoObject在您的情况下为）也应该是动态的string。
像这样的东西：
dynamic parentDynamic = new ExpandoObject();
parentDynamic.GroupOne = new ExpandoObject();
parentDynamic.GroupOne.ChildOne = new ExpandoObject();
parentDynamic.GroupOne.ChildOne.FirstName = "John";
parentDynamic.GroupOne.ChildOne.LastName = "Smith";
parentDynamic.GroupOne.ChildOne.Occupation = "Plumber";
或搭配IDictionary<string, object>演员：
IDictionary<string, object> parent = new ExpandoObject();
IDictionary<string, object> group = new ExpandoObject();
IDictionary<string, object> child = new ExpandoObject();
child["FirstName"] = "John";
child["LastName"] = "Smith";
child["Occupation"] = "Plumber";
parent["GroupOne"] = group;
group["ChildOne"] = child;
dynamic parentDynamic = parent;
Console.WriteLine(parentDynamic.GroupOne.ChildOne.Occupation);
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