ES-975464 - Resolve the ReadMe issue in this sample repository

Author: SreemonPremkumarM

README.md

@@ -1,2 +1,114 @@
-# How to work with check boxes in bound mode in wpf treeview?
-This repository describes how to work with check boxes in bound mode in wpf treeview
+# How to work with check boxes in bound mode in WPF TreeView
+
+This repository describes how to work with check boxes in bound mode in [WPF TreeView](https://www.syncfusion.com/wpf-controls/treeview) (SfTreeView).
+
+When you are populating treeview nodes from [ItemsSource](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.TreeView.SfTreeView.html#Syncfusion_UI_Xaml_TreeView_SfTreeView_ItemsSource), then you can get or set the checked items by using [CheckedItems](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.TreeView.SfTreeView.html#Syncfusion_UI_Xaml_TreeView_SfTreeView_CheckedItems) property.
+
+SfTreeView supports to check multiple items through binding the `CheckedItems` property from view model with `ObservableCollection<object>` type.
+
+#### XAML
+
+``` xml
+<syncfusion:SfTreeView 
+            x:Name="sfTreeView"
+            Margin="10"
+            BorderThickness="1"
+            AutoExpandMode="AllNodes"
+            BorderBrush="LightGray"
+            AllowDragging="True"
+            SelectionMode="Multiple"
+            CheckBoxMode ="Recursive"
+            CheckedItems="{Binding CheckedStates}"
+            ChildPropertyName="Models"
+            ExpandActionTrigger="Node"
+            ItemTemplateDataContextType="Node"
+            FocusVisualStyle="{x:Null}"
+            IsAnimationEnabled="True"                     
+            ItemsSource="{Binding Items}">            
+<syncfusion:SfTreeView.ItemTemplate>
+        <DataTemplate>
+            <Grid>                        
+                <CheckBox x:Name="CheckBox" FocusVisualStyle="{x:Null}"
+                                    IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
+                <TextBlock FontSize="12" VerticalAlignment="Center" Text="{Binding Content.State}" Margin="25,0,0,0"/>
+            </Grid>
+        </DataTemplate>
+    </syncfusion:SfTreeView.ItemTemplate>
+</syncfusion:SfTreeView>
+```
+
+#### C#
+
+``` csharp
+public class ViewModel : NotificationObject
+{
+    public ObservableCollection<Model> Items { get; set; }
+
+    private ObservableCollection<object> checkedStates;
+
+    public ObservableCollection<object> CheckedStates
+    {
+        get { return checkedStates; }
+        set { checkedStates = value; }
+    }
+
+    public ViewModel()
+    {
+        Items = new ObservableCollection<Model>();
+        checkedStates = new ObservableCollection<object>();
+                 
+        var country1 = new Model { State = "Australia" };
+        var country2 = new Model { State = "Brazil" };
+        var country3 = new Model { State = "China" };
+        var country4 = new Model { State = "France" };
+
+        var aus_state1 = new Model { State = "New South Wales" };
+        var aus_state2 = new Model { State = "Victoria" };
+        var aus_state3 = new Model { State = "South Autralia" };
+        var aus_state4 = new Model { State = "Western Australia" };
+
+        var brazil_state1 = new Model { State = "Parana" };
+        var brazil_state2 = new Model { State = "Ceara" };
+        var brazil_state3 = new Model { State = "Acre" };
+
+        var china_state1 = new Model { State = "Guangzhou" };
+        var china_state2 = new Model { State = "Shanghai" };
+        var china_state3 = new Model { State = "Beijing" };
+        var china_state4 = new Model { State = "Shantou" };
+
+        var france_state1 = new Model { State = "Pays de la Loire" };
+        var france_state2 = new Model { State = "Aquitaine" };
+        var france_state3 = new Model { State = "Brittany" };
+        var france_state4 = new Model { State = "Lorraine" };
+
+        country1.Models.Add(aus_state1);
+        country1.Models.Add(aus_state2);
+        country1.Models.Add(aus_state3);
+        country1.Models.Add(aus_state4);
+
+        country2.Models.Add(brazil_state1);
+        country2.Models.Add(brazil_state2);
+        country2.Models.Add(brazil_state3);
+
+        country3.Models.Add(china_state1);
+        country3.Models.Add(china_state2);
+        country3.Models.Add(china_state3);
+        country3.Models.Add(china_state4);
+
+        country4.Models.Add(france_state1);
+        country4.Models.Add(france_state2);
+        country4.Models.Add(france_state3);
+        country4.Models.Add(france_state4);
+
+        Items.Add(country1);
+        Items.Add(country2);
+        Items.Add(country3);
+        Items.Add(country4);
+
+        checkedStates.Add(aus_state1);
+        checkedStates.Add(aus_state2);
+        checkedStates.Add(country2);
+        checkedStates.Add(country3);
+    }
+}
+```