diff --git "a/04_\347\224\250\346\210\267\344\272\244\344\272\222/04_\347\224\250\346\210\267\344\272\244\344\272\222/Class1.cs" "b/04_\347\224\250\346\210\267\344\272\244\344\272\222/04_\347\224\250\346\210\267\344\272\244\344\272\222/Class1.cs"
index 06e421ac56b7fc7586f57d630bc889e2b7408524..eaa6ca24b9b51a5c56f6a2c3bcfc83e3e5786890 100644
--- "a/04_\347\224\250\346\210\267\344\272\244\344\272\222/04_\347\224\250\346\210\267\344\272\244\344\272\222/Class1.cs"
+++ "b/04_\347\224\250\346\210\267\344\272\244\344\272\222/04_\347\224\250\346\210\267\344\272\244\344\272\222/Class1.cs"
@@ -1,4 +1,4 @@
-using Autodesk.AutoCAD.ApplicationServices;
+using Autodesk.AutoCAD.ApplicationServices;
 using Autodesk.AutoCAD.EditorInput;
 using Autodesk.AutoCAD.Geometry;
 using Autodesk.AutoCAD.Runtime;
@@ -90,7 +90,7 @@ namespace _04_用户交互
             
             while(isC)
             {
-                if (lineList.Count == 2)
+                if (lineList.Count >= 2)
                 {
                     ppr = ed.GetPoint("\n 指定一下点或 [闭合(C)/放弃(U)]:", pointPre, new string[] { "C","U" });
                 }
@@ -98,7 +98,7 @@ namespace _04_用户交互
                 {
                     ppr = ed.GetPoint("\n 指定下一点或[放弃(U)]", pointPre, new string[] { "U" });
                 }
-                ppr = ed.GetPoint("\n 指定下一点或 [放弃(U)]", pointPre, new string[] { "U" });
+                
                 Point3d pointNext; // 用于接收下一点坐标
                 if (ppr.Status == PromptStatus.Cancel) return;
                 if (ppr.Status == PromptStatus.None) return;