1、Session has not been configured for this application or request
NETCore 使用Session 存储：
Startup.cs 如下配置
ConfigureServices: services.AddSession(); services.AddHttpContextAccessor();
Configure : app.UseSession();

2、Ajax 异步请求报 400 错误
services.AddMvc()
.AddRazorPagesOptions(options =>
{
options.Conventions.ConfigureFilter(new IgnoreAntiforgeryTokenAttribute());
})
.SetCompatibilityVersion(CompatibilityVersion.Latest);