Доработано Demo

Demo/Models/Request.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo.Models
+{
+    internal class Request
+    {
+        public string Title { get; set; }
+        public int FilesCount { get; set; }
+        public string Details { get; set; } = "";
+    }
+}