diff --git a/ScreenShot/CheckBoxStateUpdateTreeViewXamarin.png b/ScreenShot/CheckBoxStateUpdateTreeViewXamarin.png
index a8fa8af..b412451 100644
Binary files a/ScreenShot/CheckBoxStateUpdateTreeViewXamarin.png and b/ScreenShot/CheckBoxStateUpdateTreeViewXamarin.png differ
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.Android/TreeViewXamarin.Android.csproj b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.Android/TreeViewXamarin.Android.csproj
index cd38ed6..2745644 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.Android/TreeViewXamarin.Android.csproj
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.Android/TreeViewXamarin.Android.csproj
@@ -50,10 +50,10 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Syncfusion.Xamarin.Buttons">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Syncfusion.Xamarin.SfTreeView">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
   </ItemGroup>
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.UWP/TreeViewXamarin.UWP.csproj b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.UWP/TreeViewXamarin.UWP.csproj
index a1fd231..758037a 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.UWP/TreeViewXamarin.UWP.csproj
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.UWP/TreeViewXamarin.UWP.csproj
@@ -144,10 +144,10 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Syncfusion.Xamarin.Buttons">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Syncfusion.Xamarin.SfTreeView">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.1.5" />
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.iOS/TreeViewXamarin.iOS.csproj b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.iOS/TreeViewXamarin.iOS.csproj
index d80041e..eb97414 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.iOS/TreeViewXamarin.iOS.csproj
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.iOS/TreeViewXamarin.iOS.csproj
@@ -149,10 +149,10 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Syncfusion.Xamarin.Buttons">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Syncfusion.Xamarin.SfTreeView">
-      <Version>19.1.0.55</Version>
+      <Version>19.1.0.57</Version>
     </PackageReference>
     <PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
   </ItemGroup>
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Helper/TreeViewBehavior.cs b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Helper/TreeViewBehavior.cs
index d7ff85f..45d723f 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Helper/TreeViewBehavior.cs
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Helper/TreeViewBehavior.cs
@@ -45,36 +45,46 @@ private void UpdateCheckBoxState()
             var checkedNodes = TreeView.GetCheckedNodes();
             foreach (var node in checkedNodes)
             {
-                //Update child nodes based on parent's checked state.
                 if (node.ParentNode == null && node.HasChildNodes)
                 {
-                    setChildChecked(node);
+                    //Update child nodes based on parent's checked state.
+                    SetChildChecked(node);
                 }
 
-                //Update parent node based on child's checked state.
-                else if (node.ParentNode != null)
+                else
                 {
-                    if (node.ParentNode.ChildNodes.All(x => x.IsChecked == true))
-                    {
-                        node.ParentNode.IsChecked = true;
-                    }
-                    else node.ParentNode.IsChecked = null;
+                    //Update parent node based on child's checked state.
+                    SetParentChecked(node);
                 }
-
             }
         }
 
-        private void setChildChecked(TreeViewNode node)
+        private void SetChildChecked(TreeViewNode node)
         {
             foreach (var child in node.ChildNodes)
             {
                 child.IsChecked = true;
                 if (child.HasChildNodes)
                 {
-                    setChildChecked(child);
+                    SetChildChecked(child);
                 }
             }
         }
+
+        private void SetParentChecked(TreeViewNode node)
+        {
+            if (node.ParentNode == null) return;
+
+            if (node.ParentNode.ChildNodes.All(x => x.IsChecked == true))
+                node.ParentNode.IsChecked = true;
+
+            else node.ParentNode.IsChecked = null;
+
+            if(node.ParentNode != null)
+            {
+                SetParentChecked(node.ParentNode);
+            }
+        }
         #endregion
     }
 }
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.csproj b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.csproj
index 5ae5ca5..7f9d19a 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.csproj
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.csproj
@@ -16,8 +16,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Syncfusion.Xamarin.Buttons" Version="19.1.0.55" />
-    <PackageReference Include="Syncfusion.Xamarin.SfTreeView" Version="19.1.0.55" />
+    <PackageReference Include="Syncfusion.Xamarin.Buttons" Version="19.1.0.57" />
+    <PackageReference Include="Syncfusion.Xamarin.SfTreeView" Version="19.1.0.57" />
     <PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/ViewModel/FileManagerViewModel.cs b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/ViewModel/FileManagerViewModel.cs
index c83de21..175d8ef 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/ViewModel/FileManagerViewModel.cs
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/ViewModel/FileManagerViewModel.cs
@@ -111,8 +111,7 @@ private ObservableCollection<Folder> GetFiles()
             checkedItems.Add(doc);
             checkedItems.Add(typeScript);
             checkedItems.Add(uiGuide);
-            checkedItems.Add(stone);
-            checkedItems.Add(pictures);
+            checkedItems.Add(img1);
             checkedItems.Add(song);
 
             return nodeImageInfo;
diff --git a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Views/MainPage.xaml b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Views/MainPage.xaml
index a676b19..6acd03f 100644
--- a/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Views/MainPage.xaml
+++ b/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Views/MainPage.xaml
@@ -11,26 +11,27 @@
         <local:FileManagerViewModel x:Name="viewModel"/>
     </ContentPage.BindingContext>
 
-    <treeView:SfTreeView x:Name="treeView"
+    <StackLayout>
+        <treeView:SfTreeView x:Name="treeView"
                          ItemsSource="{Binding Folders}"
                          ItemTemplateContextType="Node"
                          AutoExpandMode="AllNodesExpanded"
                          CheckedItems="{Binding CheckedItems}">
-        <treeView:SfTreeView.Behaviors>
-            <local:TreeViewBehavior/>
-        </treeView:SfTreeView.Behaviors>
-        <treeView:SfTreeView.HierarchyPropertyDescriptors>
-            <TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:Folder}" ChildPropertyName="Files"/>
-            <TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:File}" ChildPropertyName="SubFiles"/>
-        </treeView:SfTreeView.HierarchyPropertyDescriptors>
+            <treeView:SfTreeView.Behaviors>
+                <local:TreeViewBehavior/>
+            </treeView:SfTreeView.Behaviors>
+            <treeView:SfTreeView.HierarchyPropertyDescriptors>
+                <TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:Folder}" ChildPropertyName="Files"/>
+                <TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:File}" ChildPropertyName="SubFiles"/>
+            </treeView:SfTreeView.HierarchyPropertyDescriptors>
 
-        <treeView:SfTreeView.ItemTemplate>
-            <DataTemplate>
-                <Grid Padding="5">
-                    <SfButtons:SfCheckBox x:Name="CheckBox" Text="{Binding Content.FileName}" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
-                </Grid>
-            </DataTemplate>
-        </treeView:SfTreeView.ItemTemplate>
-    </treeView:SfTreeView>
-
-</ContentPage>
+            <treeView:SfTreeView.ItemTemplate>
+                <DataTemplate>
+                    <Grid Padding="5">
+                        <SfButtons:SfCheckBox x:Name="CheckBox" Text="{Binding Content.FileName}" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
+                    </Grid>
+                </DataTemplate>
+            </treeView:SfTreeView.ItemTemplate>
+        </treeView:SfTreeView>
+    </StackLayout>
+</ContentPage>
\ No newline at end of file