更新

AntdWpf/Converters/ArcSizeConverter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Markup;
+
+//https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/blob/master/src/MaterialDesignThemes.Wpf/Converters/CircularProgressBar/ArcSizeConverter.cs
+
+
+namespace AntdWpf.Converters
+{
+    public class ArcSizeConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+            => value is double v && (v > 0.0) ? new Size(v / 2, v / 2) : new Point();
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+}