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

Author: SreemonPremkumarM

README.md

@@ -1,2 +1,17 @@
-# How-to-programmatically-expand-the-root-nodes-in-winforms-treeviewadv-
-This session explains how to programmatically expand the root nodes in winforms treeviewadv?
+# How to programmatically expand the root nodes in WinForms TreeView
+
+This session explains how to programmatically expand the root nodes in [WinForms TreeView](https://help.syncfusion.com/windowsforms/treeview/overview) (TreeViewAdv)?
+
+You can expand the [Root](https://help.syncfusion.com/cr/windowsforms/Syncfusion.Windows.Forms.Tools.TreeViewAdv.html#Syncfusion_Windows_Forms_Tools_TreeViewAdv_Root) nodes of the [TreeViewAdv](https://help.syncfusion.com/cr/windowsforms/Syncfusion.Windows.Forms.Tools.TreeViewAdv.html) by using the [Expand](https://help.syncfusion.com/cr/windowsforms/Syncfusion.Windows.Forms.Tools.TreeNodeAdv.html#Syncfusion_Windows_Forms_Tools_TreeNodeAdv_Expand) method of the node.
+
+``` csharp
+TreeNodeAdv root = this.treeViewAdv1.Root;
+foreach (TreeNodeAdv node in root.Nodes)
+{
+    // Call the Expand method on each root node.
+    node.Expand();
+}
+root.Expand();
+```
+
+![How to programmatically expand the root nodes in WinForms TreeView](https://www.syncfusion.com/uploads/user/kb/wf/wf-28805/wf-28805_img1.png)