改写

将原来的.net framework 寻找 替代 方案，改写成.net core 程序

BLWWebServices/Models/ErrorViewModel.cs

@@ -0,0 +1,9 @@
+namespace BLWWebServices.Models
+{
+    public class ErrorViewModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+    }
+}