ES-975464 - Addressed the concerns

Author: SreemonPremkumarM

README.md

@@ -1,9 +1,11 @@
-# How to programmatically expand an item in WPF TreeViewAdv
+# How to Programmatically Expand an Item in WPF TreeViewAdv?
 
 This sample shows how to programmatically expand an item in [WPF TreeView](https://help.syncfusion.com/wpf/classic/treeview/overview) (TreeViewAdv).
 
 `TreeViewAdv` allows to expand or collapse each node by setting [IsExpanded](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.Tools.Controls.TreeViewItemAdv.html#Syncfusion_Windows_Tools_Controls_TreeViewItemAdv_IsExpanded) property.
 
+#### XAML
+
 ``` csharp
 public MainWindow()
 {
@@ -13,29 +15,88 @@ public MainWindow()
     TreeViewItemAdv subitem11 = new TreeViewItemAdv() { Header = "Single" };
     TreeViewItemAdv subitem12 = new TreeViewItemAdv() { Header = "Married" };
     TreeViewItemAdv subitem13 = new TreeViewItemAdv() { Header = "Married with Children" };
-
     root1.Items.Add(subitem11);
     root1.Items.Add(subitem12);
     root1.Items.Add(subitem13);
-
     TreeViewItemAdv root2 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
     TreeViewItemAdv subitem21 = new TreeViewItemAdv() { Header = "Hepatitis B" };
     TreeViewItemAdv subitem22 = new TreeViewItemAdv() { Header = "Tetanus" };
     TreeViewItemAdv subitem23 = new TreeViewItemAdv() { Header = "Polio" };
     TreeViewItemAdv subitem24 = new TreeViewItemAdv() { Header = "Measles" };
-
     root2.Items.Add(subitem21);
     root2.Items.Add(subitem22);
     root2.Items.Add(subitem23);
     root2.Items.Add(subitem24);
-
     TreeViewItemAdv root3 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
-
     treeViewAdv.Items.Add(root1);
     treeViewAdv.Items.Add(root2);
     treeViewAdv.Items.Add(root3);
     Grid.Children.Add(treeViewAdv);
+    root1.IsExpanded = true;
+}
+```
 
+#### C#
+
+``` csharp
+public MainWindow()
+{
+    InitializeComponent();
+    TreeViewAdv treeViewAdv = new TreeViewAdv();
+    TreeViewItemAdv root1 = new TreeViewItemAdv() { Header = "Marital Status" };
+    TreeViewItemAdv subitem11 = new TreeViewItemAdv() { Header = "Single" };
+    TreeViewItemAdv subitem12 = new TreeViewItemAdv() { Header = "Married" };
+    TreeViewItemAdv subitem13 = new TreeViewItemAdv() { Header = "Married with Children" };
+    root1.Items.Add(subitem11);
+    root1.Items.Add(subitem12);
+    root1.Items.Add(subitem13);
+    TreeViewItemAdv root2 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
+    TreeViewItemAdv subitem21 = new TreeViewItemAdv() { Header = "Hepatitis B" };
+    TreeViewItemAdv subitem22 = new TreeViewItemAdv() { Header = "Tetanus" };
+    TreeViewItemAdv subitem23 = new TreeViewItemAdv() { Header = "Polio" };
+    TreeViewItemAdv subitem24 = new TreeViewItemAdv() { Header = "Measles" };
+    root2.Items.Add(subitem21);
+    root2.Items.Add(subitem22);
+    root2.Items.Add(subitem23);
+    root2.Items.Add(subitem24);
+    TreeViewItemAdv root3 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
+    treeViewAdv.Items.Add(root1);
+    treeViewAdv.Items.Add(root2);
+    treeViewAdv.Items.Add(root3);
+    Grid.Children.Add(treeViewAdv);
     root1.IsExpanded = true;
 }
-```
+```
+
+#### VB
+
+``` vb
+Public Sub New()
+    InitializeComponent()
+    Dim treeViewAdv As TreeViewAdv = New TreeViewAdv()
+    Dim root1 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Marital Status"}
+    Dim subitem11 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Single"}
+    Dim subitem12 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Married"}
+    Dim subitem13 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Married with Children"}
+    root1.Items.Add(subitem11)
+    root1.Items.Add(subitem12)
+    root1.Items.Add(subitem13)
+    Dim root2 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Baby Vaccines"}
+    Dim subitem21 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Hepatitis B"}
+    Dim subitem22 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Tetanus"}
+    Dim subitem23 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Polio"}
+    Dim subitem24 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Measles"}
+    root2.Items.Add(subitem21)
+    root2.Items.Add(subitem22)
+    root2.Items.Add(subitem23)
+    root2.Items.Add(subitem24)
+    Dim root3 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Baby Vaccines"}
+    treeViewAdv.Items.Add(root1)
+    treeViewAdv.Items.Add(root2)
+    treeViewAdv.Items.Add(root3)
+    Grid.Children.Add(treeViewAdv)
+    root1.IsExpanded = True
+End Sub
+```
+
+![TreeView with expanded nodes](TreeViewWithExpandedNodes.png)