How to add nodes in the treeview programmatically?

Nodes can be added programmatically as follows:

TreeViewNode rootNode=new TreeViewNode();

rootNode.Text="MailBox";

rootNode.Expanded=true;

rootNode.ImagePath="root.gif";

TreeView1.Items.Add(rootNode);

rootNode As TreeViewNode = New TreeViewNode()

rootNode.Text="MailBox"

rootNode.Expanded=True

rootNode.ImagePath="root.gif"

TreeView1.Items.Add(rootNode)

Note: TreeViewNode class is under the namespace Syncfusion.Web.UI.WebControls.Tools

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