Update README.md

Author: SweathaBharathi

README.md

@@ -1,2 +1,13 @@
-# How-to-count-checked-nodes-of-WF-TreeViewAdv
-This respository contains the sample that how to count the checked nodes of WF TreeViewAdv control.
+# How to count all checked nodes of WinForms TreeViewAdv?
+
+You can get the count for all checked nodes in [WinForms TreeViewAdv](https://www.syncfusion.com/winforms-ui-controls/treeview) control by using [CheckedNodes](https://help.syncfusion.com/cr/windowsforms/Syncfusion.Windows.Forms.Tools.TreeViewAdv.html#Syncfusion_Windows_Forms_Tools_TreeViewAdv_CheckedNodes) property. Refer the below code for your reference.
+
+**C#**
+```csharp
+int checkedCount = treeView1.CheckedNodes.Count;
+```
+
+**VB.Net**
+```csharp
+Dim checkedCount As Integer = treeView1.CheckedNodes.Count
+```