X-Frame-Options 为 deny 报错

解决方法一
//代码中添加响应头
app.Use(async (context, next) =>
{
    // Do work that can write to the Response.
    context.Response.Headers.Add("X-Frame-Options", "SAMEORIGIN");
    await next.Invoke();
    // Do logging or other work that doesn't write to the Response.
});