launch error display

Views/ErrorDialog.axaml.cs

@@ -0,0 +1,23 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace UnifiedFarmLauncher.Views
+{
+    public partial class ErrorDialog : Window
+    {
+        public ErrorDialog()
+        {
+            InitializeComponent();
+        }
+
+        public ErrorDialog(string errorMessage) : this()
+        {
+            this.FindControl<TextBlock>("ErrorTextBlock")!.Text = errorMessage;
+        }
+
+        private void OkButton_Click(object? sender, RoutedEventArgs e)
+        {
+            Close();
+        }
+    }
+}