.NET Core动态属性（ExpandoObject）的json序列化

• 问题描述：dynamic类型被忽略
• 解决办法：

services.AddMvc().AddJsonOptions(opt =>
{
    opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
});
// .net core 3.0以上
// Microsoft.AspNetCore.Mvc.NewtonsoftJson
.AddNewtonsoftJson(opt =>
{
    opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
});

vs2019出提示：缺少配置和管理IIS Express所需的组件

未能正确加载“Visual Web Developer Project Persistence Package”包。

• 解决：修复vs2019.

使用mvc报错

Endpoint Routing does not support 'IApplicationBuilder.UseMvc(...)'. To use 'IApplicationBuilder.UseMvc' set 'MvcOptions.EnableEndpointRouting = false' inside 'ConfigureServices(...).”
解决方法：

services.AddMvc(options => { options.EnableEndpointRouting = false; });