更新

AntdWpf/Converters/CornerRadiusToDoubleConverter.cs

@@ -0,0 +1,25 @@
+namespace AntdWpf.Converters;
+
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+[ValueConversion(typeof(CornerRadius), typeof(double))]
+public class CornerRadiusToDoubleConverter : IValueConverter
+{
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (!(value is CornerRadius))
+        {
+            return default(double);
+        }
+
+        var cornerRadius = (CornerRadius)value;
+        return Math.Max(cornerRadius.TopLeft, Math.Max(cornerRadius.TopRight, Math.Max(cornerRadius.BottomRight, cornerRadius.BottomLeft)));
+    }
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        return DependencyProperty.UnsetValue;
+    }
+}