diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
index e717124..1ee1794 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
@@ -88,9 +88,12 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 RaisePropertyChanged(nameof(FillColor));
             }
+
+            RaisePropertyChanged(sender, e);
         }
 
         private Color _shadowColor = Colors.Transparent;
+        [CanDo]
         public Color ShadowColor
         {
             get
@@ -107,6 +110,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _lineWidth = 1d;
+        [CanDo]
         public double LineWidth
         {
             get
@@ -123,6 +127,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }       
 
         private LineDashStyle _lineDashStyle = LineDashStyle.None;
+        [CanDo]
         public LineDashStyle LineDashStyle
         {
             get
@@ -139,6 +144,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private LineAnimation _lineAnimation = LineAnimation.None;
+        [CanDo]
         public LineAnimation LineAnimation
         {
             get
@@ -152,6 +158,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _lineAnimationDuration = 1;
+        [CanDo]
         public double LineAnimationDuration
         {
             get
@@ -214,6 +221,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private BrushType _brushType = BrushType.SolidColorBrush;
+        [CanDo]
         public BrushType BrushType
         {
             get
@@ -230,6 +238,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private Color _color = new Color();
+        [CanDo]
         public Color Color
         {
             get
@@ -279,6 +288,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 SetProperty(ref _selectedGradientStop, value);
             }
         }
+
         private Point _startPoint;
         public Point StartPoint
         {
@@ -306,6 +316,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _opacity = 1;
+        [CanDo]
         public double Opacity
         {
             get
@@ -332,6 +343,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private string _image;
+        [CanDo]
         public string Image
         {
             get
@@ -345,6 +357,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private LinearOrientation _linearOrientation;
+        [CanDo]
         public LinearOrientation LinearOrientation
         {
             get
@@ -358,6 +371,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private RadialOrientation _radialOrientation;
+        [CanDo]
         public RadialOrientation RadialOrientation
         {
             get
@@ -371,6 +385,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private int _angle;
+        [CanDo]
         public int Angle
         {
             get
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/FontViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/FontViewModel.cs
index 87ca138..ea325c8 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/FontViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/FontViewModel.cs
@@ -197,6 +197,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         #endregion
 
         private string _fontFamily = "Arial";
+        [CanDo]
         public string FontFamily
         {
             get
@@ -213,6 +214,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _fontSize = 12;
+        [CanDo]
         public double FontSize
         {
             get
@@ -230,6 +232,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private Color _fontColor = Colors.Black;
+        [CanDo]
         public Color FontColor
         {
             get
@@ -246,7 +249,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private FontWeight _fontWeight = FontWeights.Regular;
-
+        [CanDo]
         public FontWeight FontWeight
         {
             get
@@ -263,6 +266,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private FontStyle _fontStyle = FontStyles.Normal;
+        [CanDo]
         public FontStyle FontStyle
         {
             get
@@ -279,7 +283,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private FontStretch _fontStretch = FontStretches.Normal;
-
+        [CanDo]
         public FontStretch FontStretch
         {
             get
@@ -296,6 +300,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private bool _underline;
+        [CanDo]
         public bool Underline
         {
             get
@@ -316,6 +321,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private bool _strikethrough;
+        [CanDo]
         public bool Strikethrough
         {
             get
@@ -336,6 +342,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private bool _overLine;
+        [CanDo]
         public bool OverLine
         {
             get
@@ -356,7 +363,6 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private TextDecorationCollection _textDecorations;
-
         public TextDecorationCollection TextDecorations
         {
             get
@@ -383,6 +389,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private Color _textEffectColor = Colors.Transparent;
+        [CanDo]
         public Color TextEffectColor
         {
             get { return _textEffectColor; }
@@ -397,6 +404,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private Color _highlightColor = Colors.Transparent;
+        [CanDo]
         public Color HighlightColor
         {
             get { return _highlightColor; }
@@ -411,6 +419,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private FontCase _fontCase = FontCase.None;
+        [CanDo]
         public FontCase FontCase
         {
             get
@@ -427,6 +436,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private HorizontalAlignment _horizontalAlignment = HorizontalAlignment.Center;
+        [CanDo]
         public HorizontalAlignment HorizontalAlignment
         {
             get
@@ -443,6 +453,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private VerticalAlignment _verticalAlignment = VerticalAlignment.Center;
+        [CanDo]
         public VerticalAlignment VerticalAlignment
         {
             get
@@ -459,6 +470,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _lineHeight = Double.NaN;
+        [CanDo]
         public double LineHeight
         {
             get
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ShapeViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ShapeViewModel.cs
index 670cb66..d96d2c9 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ShapeViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ShapeViewModel.cs
@@ -105,6 +105,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private string _path;
+        [CanDo]
         public string Path
         {
             get
@@ -118,6 +119,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _witdh;
+        [CanDo]
         public double Width
         {
             get
@@ -131,6 +133,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private double _height;
+        [CanDo]
         public double Height
         {
             get
@@ -144,6 +147,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private ArrowPathStyle _pathStyle = ArrowPathStyle.None;
+        [CanDo]
         public ArrowPathStyle PathStyle
         {
             get
@@ -163,6 +167,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         private ArrowSizeStyle _sizeStyle = ArrowSizeStyle.Middle;
+        [CanDo]
         public ArrowSizeStyle SizeStyle
         {
             get
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramServicesProvider.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramServicesProvider.cs
index e579807..4098401 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramServicesProvider.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramServicesProvider.cs
@@ -93,23 +93,23 @@ namespace AIStudio.Wpf.DiagramDesigner.ViewModels.BaseViewModel
             }
         }
 
-        private IShapeViewModel _linkMarkerViewModel;
+        private IShapeViewModel _shapeViewModel;
         public IShapeViewModel ShapeViewModel
         {
             get
             {
-                return _linkMarkerViewModel;
+                return _shapeViewModel;
             }
             set
             {
-                if (_linkMarkerViewModel != null)
+                if (_shapeViewModel != null)
                 {
-                    _linkMarkerViewModel.PropertyChanged -= ViewModel_PropertyChanged;
+                    _shapeViewModel.PropertyChanged -= ViewModel_PropertyChanged;
                 }
-                SetProperty(ref _linkMarkerViewModel, value);
-                if (_linkMarkerViewModel != null)
+                SetProperty(ref _shapeViewModel, value);
+                if (_shapeViewModel != null)
                 {
-                    _linkMarkerViewModel.PropertyChanged += ViewModel_PropertyChanged;
+                    _shapeViewModel.PropertyChanged += ViewModel_PropertyChanged;
                 }
             }
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
index 928fd2d..e4bd4a4 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
@@ -29,23 +29,26 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         public SelectableViewModelBase(IDiagramViewModel root)
         {
+            IsLoaded = false;
             Init(root, true);
-            (FontViewModel as FontViewModel).PropertyChanged += FontViewModel_PropertyChanged;
+            IsLoaded = true;
         }
 
         public SelectableViewModelBase(IDiagramViewModel root, SelectableItemBase designer)
         {
+            IsLoaded = false;
             Init(root, false);
             LoadDesignerItemViewModel(designer);
-            (FontViewModel as FontViewModel).PropertyChanged += FontViewModel_PropertyChanged;
+            IsLoaded = true;
         }
 
         public SelectableViewModelBase(IDiagramViewModel root, SerializableItem serializableItem, string serializableType)
         {
+            IsLoaded = false;
             Init(root, false);
             SelectableItemBase obj = SerializeHelper.DeserializeObject(serializableItem.SerializableTypeName, serializableItem.SerializableString, serializableType);
             LoadDesignerItemViewModel(obj);
-            (FontViewModel as FontViewModel).PropertyChanged += FontViewModel_PropertyChanged;
+            IsLoaded = true;
         }
 
         public virtual SerializableItem ToSerializableItem(string serializableType)
@@ -67,7 +70,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         protected virtual void Init(IDiagramViewModel root, bool initNew)
-        {
+        { 
             Root = root;
 
             if (Root?.ColorViewModel != null)
@@ -103,6 +106,9 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 InitNew();
             }
+
+            this.PropertyChanged -= Item_PropertyChanged;
+            this.PropertyChanged += Item_PropertyChanged;
         }
 
         protected virtual void InitNew()
@@ -123,6 +129,11 @@ namespace AIStudio.Wpf.DiagramDesigner
             ShapeViewModel = CopyHelper.Mapper(designerbase.SharpItem);
         }
 
+        protected bool IsLoaded
+        {
+            get;set;
+        }
+
         public IDiagramViewModel Root
         {
             get; set;
@@ -299,7 +310,15 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             set
             {
+                if (_colorViewModel != null)
+                {
+                    _colorViewModel.PropertyChanged -= ColorViewModel_PropertyChanged;
+                }
                 SetProperty(ref _colorViewModel, value);
+                if (_colorViewModel != null)
+                {
+                    _colorViewModel.PropertyChanged += ColorViewModel_PropertyChanged;
+                }
             }
         }
 
@@ -312,7 +331,15 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             set
             {
+                if (_fontViewModel != null)
+                {
+                    _fontViewModel.PropertyChanged -= FontViewModel_PropertyChanged;
+                }
                 SetProperty(ref _fontViewModel, value);
+                if (_fontViewModel != null)
+                {
+                    _fontViewModel.PropertyChanged += FontViewModel_PropertyChanged;
+                }
             }
         }
 
@@ -325,7 +352,15 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             set
             {
+                if (_shapeViewModel != null)
+                {
+                    _shapeViewModel.PropertyChanged -= ShapeViewModel_PropertyChanged;
+                }
                 SetProperty(ref _shapeViewModel, value);
+                if (_shapeViewModel != null)
+                {
+                    _shapeViewModel.PropertyChanged += ShapeViewModel_PropertyChanged;
+                }
             }
         }
 
@@ -384,14 +419,38 @@ namespace AIStudio.Wpf.DiagramDesigner
             return IsReadOnly == false;
         }
 
+        protected virtual void Item_PropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            if (IsLoaded == false) { return; }
+        }
+
         protected virtual void FontViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
         {
+            if (IsLoaded == false) { return; }
+
             if (e.PropertyName == nameof(FontViewModel.FontCase))
             {
                 RaisePropertyChanged("Text");
             }
+
+            RaisePropertyChanged(sender, e);
         }
 
+        protected virtual void ColorViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+        {
+            if (IsLoaded == false) { return; }
+
+            RaisePropertyChanged(sender, e);
+        }
+
+        protected virtual void ShapeViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+        {
+            if (IsLoaded == false) { return; }
+
+            RaisePropertyChanged(sender, e);
+        }
+
+
         public override string ToString()
         {
             return $"{Id}-{Text}";
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BindableBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BindableBase.cs
index 4a4f6de..83a04e4 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BindableBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BindableBase.cs
@@ -134,6 +134,11 @@ namespace AIStudio.Wpf.DiagramDesigner
             PropertyChanged?.Invoke(sender, new ValuePropertyChangedEventArgs(propertyName, oldvalue, newvalue));
         }
 
+        protected void RaisePropertyChanged(object sender, PropertyChangedEventArgs args)
+        {
+            PropertyChanged?.Invoke(sender, args);
+        }
+
         /// <summary>
         /// Raises this object's PropertyChanged event.
         /// </summary>