添加项目文件。

HYJigPro/XCircle2D.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Drawing;
+using System.Runtime.CompilerServices;
+
+namespace HYJig
+{
+    public class XCircle2D : XDrawable2D, ICloneable
+    {
+        public XCircle2D(Point ptCenter, int iRadius)
+        {
+            this.PointCenter = ptCenter;
+            this.Radius = iRadius;
+        }
+
+        public override void Draw(XGraphics g)
+        {
+            try
+            {
+                Point point = new Point(this.PointCenter.X - this.Radius, this.PointCenter.Y - this.Radius);
+                RectangleF rectangleF = new RectangleF((float)(this.PointCenter.X - this.Radius), (float)(this.PointCenter.Y - this.Radius), (float)(2 * this.Radius), (float)(2 * this.Radius));
+                g.m_graphics.DrawArc(g.m_pen, rectangleF, 0f, 360f);
+            }
+            catch
+            {
+            }
+        }
+
+        public object Clone()
+        {
+            try
+            {
+                return new XCircle2D(this.PointCenter, this.Radius);
+            }
+            catch
+            {
+            }
+            return null;
+        }
+
+        public Point PointCenter { get; set; }
+
+        public int Radius { get; set; }
+
+    }
+}