修复注释乱码

XP.ImageProcessing.RoiControl/PolygonAdorner.cs

@@ -13,7 +13,7 @@ namespace XP.ImageProcessing.RoiControl
     /// </summary>
     public class PolygonAdorner : Adorner
     {
-        private List<ControlThumb> vertexThumbs = new List<ControlThumb>();  // 顶点控制�?
+        private List<ControlThumb> vertexThumbs = new List<ControlThumb>();  // 顶点控制点
         private VisualCollection visualChildren;
         private double scaleFactor = 1;
         private Models.PolygonROI? polygonROI;
@@ -28,7 +28,7 @@ namespace XP.ImageProcessing.RoiControl
             // 使用ROI模型的Points数量而不是Polygon的Points
             int pointCount = polygonROI?.Points.Count ?? 0;
 
-            // 创建顶点控制�?
+            // 创建顶点控制点
             for (int i = 0; i < pointCount; i++)
             {
                 var thumb = new ControlThumb();
@@ -80,7 +80,7 @@ namespace XP.ImageProcessing.RoiControl
 
         private void HandleRightClick(object sender, MouseButtonEventArgs e)
         {
-            // 右键删除顶点（至少保�?个顶点）
+            // 右键删除顶点（至少保留3个顶点）
             if (polygonROI != null && polygonROI.Points.Count > 3)
             {
                 Thumb? hitThumb = sender as Thumb;
@@ -104,7 +104,7 @@ namespace XP.ImageProcessing.RoiControl
             {
                 double thumbSize = 12 * scaleFactor;
 
-                // 布局顶点控制�?
+                // 布局顶点控制点
                 for (int i = 0; i < vertexThumbs.Count && i < polygonROI.Points.Count; i++)
                 {
                     vertexThumbs[i].Arrange(new Rect(