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    <p>Unfortunately (as far as I know) if you are using a WinForms TreeView control then hiding nodes is not as simple as setting the IsVisible property (due to the fact that the property is read only).</p> <p>The only way of hiding nodes is to remove them from the Nodes collection.</p> <p>This means displaying them again would require you to keep track of their location within the tree hierarchy to be able to restore them.</p> <p>The following code seems to do what you require:</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ClassLibrary; using System.Xml; using System.Diagnostics; using System.IO; using System.Xml.Linq; namespace WindowsFormsApplication { public partial class HideRestoreNodesForm : Form { private List&lt;RemovedTreeNode&gt; _removedNodes = new List&lt;RemovedTreeNode&gt;(); public HideRestoreNodesForm() { InitializeComponent(); //AddNodesToTree(); } private void searchButton_Click(object sender, EventArgs e) { TreeNode[] foundNodes = treeView1.Nodes.Find("NameOfNodeToFind", true); if(foundNodes.Length &gt; 0) { TreeNode foundNode = foundNodes[0]; HideNodes(treeView1.Nodes, foundNode); } } private void HideNodes(TreeNodeCollection nodes, TreeNode visibleNode) { List&lt;TreeNode&gt; nodesToRemove = new List&lt;TreeNode&gt;(); foreach (TreeNode node in nodes) { if (!AreNodesRelated(node, visibleNode)) { _removedNodes.Add(new RemovedTreeNode() { RemovedNode = node, ParentNode = node.Parent, RemovedNodeIndex = node.Index }); nodesToRemove.Add(node); } else { HideNodes(node.Nodes, visibleNode); } } foreach (TreeNode node in nodesToRemove) node.Remove(); } private bool AreNodesRelated(TreeNode firstNode, TreeNode secondNode) { if (!IsNodeAncestor(firstNode, secondNode) &amp;&amp; !IsNodeAncestor(secondNode, firstNode) &amp;&amp; firstNode != secondNode) { return false; } else { return true; } } private bool IsNodeAncestor(TreeNode nodeToCheck, TreeNode descendantNode) { TreeNode parentNode = descendantNode.Parent; while (parentNode != null) { if (parentNode == nodeToCheck) { return true; } else { parentNode = parentNode.Parent; } } return false; } private void restoreNodes_Click(object sender, EventArgs e) { RestoreNodes(); } private void RestoreNodes() { _removedNodes.Reverse(); foreach (RemovedTreeNode removedNode in _removedNodes) { if (removedNode.ParentNode == null) treeView1.Nodes.Add(removedNode.RemovedNode); else removedNode.ParentNode.Nodes.Insert(removedNode.RemovedNodeIndex ,removedNode.RemovedNode); } _removedNodes.Clear(); } } public class RemovedTreeNode { public TreeNode RemovedNode { get; set; } public int RemovedNodeIndex { get; set; } public TreeNode ParentNode { get; set; } } } </code></pre> <p>Hope this helps you.</p> <p>I notice you are a new user, If this or any other questions you ask on the site provide the answers you are looking for remember to accept the answers.</p> <p>See the following for more information: <a href="https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work#5235">How does accepting an answer work?</a></p>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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