背景前提：

1、在命名空间ModelA、ModelB下，都有完全相同的类定义ClassX、ClassY、ClassZ ；

2、ClassBase是父类，它的子类有：ClassX、ClassY、ClassZ 

3、在ModelB下不能访问ModelA；

4、有大量文件，每个文件里都是ModelA下的ClassX、ClassY、ClassZ中某些类型的数据（格式是json）；

要求目标：

读取这些文件的数据后，完全赋值给ModelB下对应的类

处理思路：

读取文件json字符串后替换$type标记的数据类型，再将json反序列化赋值给ModelB对应的类对象 

        //step1先进行反射，得到ModelA下的所有类型 static bool GetTypeByString(out List<Type> types) {string dll = AppDomain.CurrentDomain.BaseDirectory + $"\\ModelA.dll";Assembly assembly = Assembly.LoadFrom(dll);types = assembly.GetTypes().Where(x => x.FullName.StartsWith("ModelA ")).ToList();return types.Count > 0;}

                //step2 将json替换成JObject对象JObject jObject = JObject.Parse(json);foreach (JProperty property in jObject.Properties()) {if (property.Value.Type == JTokenType.Object) {ModifyTypeProperty(property.Value as JObject); }else if (property.Value.Type == JTokenType.Array){foreach (JObject itemJobect in (property.Value as JArray).Children<JObject>()){ModifyTypeProperty(itemJobect);}}}

        //step3 替换JObject对象的$type属性对应的信息static void ModifyTypeProperty(JObject jsonObject) {JProperty property = jsonObject.Property("$type");if (property != null) {string originalTypeName = property.Value.ToString();//完整的限定名,程序集的简单名称或完整名称 string[] arr = originalTypeName.Split(',');string typename = arr[0].Substring(arr[0].LastIndexOf('.') + 1);var findType = types.Find(x => x.Name == typename);if (findType == null) {throw new Exception($"没有找到类型：{typename}");}string modifiedType = $"{findType.FullName},{findType.Assembly.GetName().Name}";property.Value = modifiedType;}foreach (JProperty jProperty in jsonObject.Properties()) {if (jProperty.Value.Type == JTokenType.Object) {ModifyTypeProperty(jProperty.Value as JObject);}}}

//step4 处理过的jObject对象，转回Json字符串var newJson = jObject.ToString();

               //step5 对新得到的json字符串，反序列化到ModelB下的类对象JsonSerializerSettings setting = new JsonSerializerSettings(){TypeNameHandling = TypeNameHandling.Auto,};var inpara = new { FGuid = Guid.Empty, listTc  = new List<ClassX>(), listTm  = new List<ClassY>() };inpara = JsonConvert.DeserializeAnonymousType(newJson, inpara, setting);