ExceptionFilter以外的其他异常捕获

#region 指定错误处理动作
app.UseStatusCodePagesWithReExecute("/Error/{0}");//只要不是200 都能进来
app.UseExceptionHandler(errorApp =>
{
errorApp.Run(async context =>
{
context.Response.StatusCode = 200;
context.Response.ContentType = "text/html";

await context.Response.WriteAsync("<html lang="en"><body> ");
await context.Response.WriteAsync("ERROR! ");

var exceptionHandlerPathFeature =
context.Features.Get<IExceptionHandlerPathFeature>();

Console.WriteLine("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
Console.WriteLine($"{exceptionHandlerPathFeature?.Error.Message}");
Console.WriteLine("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");

// Use exceptionHandlerPathFeature to process the exception (for example,
// logging), but do NOT expose sensitive error information directly to
// the client.

if (exceptionHandlerPathFeature?.Error is FileNotFoundException)
{
await context.Response.WriteAsync("File error thrown! ");
}

await context.Response.WriteAsync("<a href="/">Home</a> ");
await context.Response.WriteAsync("</body></html> ");
await context.Response.WriteAsync(new string(' ', 512)); // IE padding
});
});
app.UseHsts();
#endregion