Implementing a Custom Provider in SharePoint 2010

To implement your own site map provider in SharePoint 2010.

public class CustomSiteMapProvider : SiteMapProvider
{
    SiteMapNode rootNode = null;

    public CustomSiteMapProvider() {}

    public override void Initialize(string name.System.Collections.Specialized.NameValueCollection attributes)
        {
            // Initialize static siteMap
            this.rootNode = new SiteMapNode(this, "rootNode", "/default.aspx", "Home");
            this.rootNode.ChildNodes.Add(new SiteMapNode(this, "childNode1","/page1", "SubPage 1"));
            this.rootNode.ChildNodes.Add(new SiteMapNode(this, "childNode2","/page2", "SubPage 2"));
        }

    public override SiteMapNode FindSiteMapNode(string rawUrl)
    {
        switch (rawUrl)
        {
            case "/default.aspx": return this.rootNode;
            case "/page1.aspx": return this.rootNode.ChildNodes[0];
            case "/page2.aspx": return this.rootNode.ChildNodes[1];
            default: return null;
        }
    }

    public override SiteMapNodeCollection GetChildNodes(SiteMapNode node)
    {
        SiteMapNodeCollection children = new SiteMapNodeCollection();
        if (node != null && node.HasChildNodes)
        {
            foreach (SiteMapNode cNode in node.ChildNodes) children.Add(cNode);
        }
        return children;
    }

    public override SiteMapNode GetParentNode(SiteMapNode node)
    {
        return (node == null) ? null : node.ParentNode;
    }

    protected override SiteMapNode GetRootNodeCore()
    {
        return rootNode;
    }
}