diff --git a/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs b/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
index 9a540e9..ff5164b 100644
--- a/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
@@ -60,7 +60,11 @@ namespace AIStudio.Wpf.DiagramDesigner
                     {
                         pointList.Add(this.startPoint.Value);
                     }
-                    pointList.Add(endPoint.Value);
+                    //点不需要保存的太密集了
+                    if ((endPoint.Value - pointList.Last()).Length >= 1)
+                    {
+                        pointList.Add(endPoint.Value);
+                    }
                 }
 
                 UpdateSelection();
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ShapeDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ShapeDesignerItemViewModel.cs
index ec2a23f..1f03d23 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ShapeDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ShapeDesignerItemViewModel.cs
@@ -12,6 +12,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 {
     public class ShapeDesignerItemViewModel : DesignerItemViewModelBase
     {
+        public ShapeDesignerItemViewModel() : this(null)
+        {
+
+        }
+
+        public ShapeDesignerItemViewModel(IDiagramViewModel root) : base(root)
+        {
+
+        }
+
+
         public ShapeDesignerItemViewModel(DrawMode drawMode, List<Point> points) : this(null, drawMode, points)
         {
         }