更新

AntdWpf/Converters/ThicknessToDoubleConverter.cs

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+namespace AntdWpf.Converters
+{
+    using System;
+    using System.Globalization;
+    using System.Linq;
+    using System.Windows;
+    using System.Windows.Data;
+    using System.Windows.Markup;
+
+    [ValueConversion(typeof(Thickness), typeof(double))]
+    public class ThicknessToDoubleConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (!(value is Thickness))
+            {
+                return default(double);
+            }
+
+            var thickness = (Thickness)value;
+            var d = Math.Max(thickness.Left, Math.Max(thickness.Top, Math.Max(thickness.Right, thickness.Bottom)));
+
+            // If it is a shape, it may be necessary to discard approximately 0.2px to remove the sawtooth.
+            // Recorded in: Window10 x64, xiaomi laptop pro15.6
+            // The cause of this problem is DPI.
+            //if (bool.Parse(parameter as string))
+            //{
+            //    d -= d * 0.176;
+            //}
+
+            return d;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return DependencyProperty.UnsetValue;
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+
+    
+}