# Using Custom Attributes Server-side

Access attributes through the **RadTreeNode** **Attributes** collection by specifying a key name:

```C#
node.Attributes["MyCustomAttributeKey"] = "Some value";
```

```VB.NET
node.Attributes("MyCustomAttributeKey") = "Some value"
```

The example below iterates the **Attributes** collection of a selected node and displays the key names and values in a **RadTextBox**.

![RadTreeView Custom Attributes](https://www.telerik.com/products/aspnet-ajax/documentation/assets/de1a2d31f97f83dba40216d1ba1b7d84/treeview_customattributesserverside.png)

```ASPNET
<telerik:RadTreeView RenderMode="Lightweight" ID="RadTreeView1" runat="server" OnNodeClick="RadTreeView1_NodeClick"
    Skin="Black">
    <Nodes>
        <telerik:RadTreeNode runat="server" Text="Alpine Parka" ProductNumber="AP0234" ProductColor="Blue"
            ProductSize="XL">
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Text="Expedition Parka" ProductNumber="EP3456"
            ProductColor="Red" Size="M">
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Text="Goosedown Jacket" ProductNumber="GJ6549"
            ProductColor="Yellow" Size="L">
        </telerik:RadTreeNode>
    </Nodes>
</telerik:RadTreeView>
```

```C#
	     
		protected void RadTreeView1_NodeClick(object sender, Telerik.Web.UI.RadTreeNodeEventArgs e)
	    {    
	        foreach (string key in e.Node.Attributes.Keys)    
	        {        
	            tbNode.Text += key + ": " + e.Node.Attributes[key] + System.Environment.NewLine;    
	        }
	    }
				
```

```VB.NET
	     
	    Protected Sub RadTreeView1_NodeClick(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadTreeNodeEventArgs)
	        For Each key As String In e.Node.Attributes.Keys
	            tbNode.Text += key + ": " + e.Node.Attributes(key) + System.Environment.NewLine
	        Next
	    End Sub
	
```