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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")

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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