Error handling system added

Views/ErrorView.axaml.cs

@@ -0,0 +1,29 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace GazpromApp.Views;
+
+public partial class ErrorView : Window
+{
+    public ErrorView()
+    {
+        InitializeComponent();
+        
+        if (Design.IsDesignMode)
+            return;
+        
+        
+    }
+
+    private void Window_OnClosing(object? sender, WindowClosingEventArgs e)
+    {
+        
+    }
+
+    private void Window_OnClosed(object? sender, EventArgs e)
+    {
+        
+    }
+}