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TreeNodeCollection.RemoveAt Method

Removes a tree node from the tree node collection at a specified index.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public virtual void RemoveAt(
	int index


Type: System.Int32

The index of the TreeNode to remove.



When a TreeNode is removed from the tree node collection, all subsequent tree nodes are moved up one position in the collection.

You can also remove a TreeNode that you previously added by using the Remove or Clear methods.


Enumerating the collection and removing nodes is not supported.

To add new TreeNode objects to the collection, use the Add, AddRange, or Insert methods.

The following code example removes the first TreeNode from a TreeView if its TreeNode.Text property is set to "Node0". When a Button is clicked, the first TreeNode in the TreeView is deleted using the RemoveAt method. This example requires that you have created a TreeView and a Button on a Form. The first TreeNode in your TreeView should have a text property of "Node0."

private void button2_Click(object sender, EventArgs e)
   // Delete the first TreeNode in the collection  
   // if the Text property is "Node0."  
   if(this.treeView1.Nodes[0].Text == "Node0")

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0