SPNavigationNode does not contain a definition for cast?

Question

public override void FeatureActivated(SPFeatureReceiverProperties properties)
{
 // Get the web site where the feature is activated.
 SPWeb parentWeb = properties.Feature.Parent as SPWeb;
 if (parentWeb == null)
  return;

 SPWeb childWeb = null;
 string childName = "ourwiki";

 // If a subsite by that name exists, open it.
 string[] webs = parentWeb.Webs.Names;
 if (webs != null && Array.IndexOf(webs, childName) >= 0)
 {
  childWeb = parentWeb.Webs[childName];
 }

 // Otherwise, create the subsite.
 if (childWeb == null)
 {
  string title = "Wiki";
  string desc = "A place to capture knowledge.";
  uint lcid = parentWeb.Language;

  string templateName = "WIKI#0";

  childWeb = parentWeb.Webs.Add(childName, title, desc, lcid, templateName, false, false);
 }

 // Let the subsite use the parent site's top link bar.
 childWeb.Navigation.UseShared = true;

 // Get a collection of navigation nodes.
 SPNavigationNodeCollection nodes = null;
 if (parentWeb.Navigation.UseShared)
 {
  // Parent site does not have its own top link bar
  // so use the parent's Quick Launch.
  nodes = parentWeb.Navigation.QuickLaunch;
 }
 else
 {
  // Parent site has its own top link bar,
  // so use it.
  nodes = parentWeb.Navigation.TopNavigationBar;
 }

 // Check for an existing link to the subsite.
 SPNavigationNode node = nodes
  .Cast<SPNavigationNode>()
  .FirstOrDefault(n => n.Url.Equals(childWeb.ServerRelativeUrl));

 // No link, so add one.
 if (node == null)
 { 
  // Create the node.
  node = new SPNavigationNode(childWeb.Title, childWeb.ServerRelativeUrl);

  // Add it to the collection.
  node = nodes.AddAsLast(node);
 }

 childWeb.Dispose();
 parentWeb.Dispose();
}
 
Error 1 'Microsoft.SharePoint.Navigation.SPNavigationNodeCollection' does not contain a definition for 'Cast' and no extension method 'Cast' accepting a first argument of type 'Microsoft.SharePoint.Navigation.SPNavigationNodeCollection' could be found (are you missing a using directive or an assembly reference?) E:\Apps\SiteCreation\SiteCreation\Layouts\SiteCreation\ApplicationPage1.aspx.cs 51 43 SiteCreation

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rihdus

Answer 1

Cast<T> is an extension method defined in System.Linq namespace.

Just include it in your .cs file:

 

using System.Linq;

 

Answer 2

Thank you Bukharin i have deployed successfully but i couldn't create any site.

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rihdus