Creating a new desktop app with avaloniaui

v2rayN/v2rayN.Desktop/Converters/DelayColorConverter.cs

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+using Avalonia.Data.Converters;
+using Avalonia.Media;
+using System.Globalization;
+
+namespace v2rayN.Desktop.Converters
+{
+    public class DelayColorConverter : IValueConverter
+    {
+        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+        {
+            int.TryParse(value?.ToString(), out var delay);
+
+            if (delay <= 0)
+                return new SolidColorBrush(Colors.Red);
+            if (delay <= 500)
+                return new SolidColorBrush(Colors.Green);
+            else
+                return new SolidColorBrush(Colors.IndianRed);
+        }
+
+        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+}