using CMS.SettingsProvider;

using CMS.CMSHelper;

using CMS.DataEngine;

using CMS.GlobalHelper;

using CMS.TreeEngine;

using CMS.SiteProvider;

using CMS.WorkflowEngine;

...

          // Prepare the TreeProvider

           // it must be initialized with user information when editing document structure

          UserInfo ui = UserInfoProvider.GetUserInfo("administrator");

          TreeProvider tree = new TreeProvider(ui);

          // Get the linked document by alias path (any culture)

           CMS.TreeEngine.TreeNode node = tree.SelectSingleNode(CMSContext.CurrentSiteName, "/TestingNewsLink", TreeProvider.ALL_CULTURES, false, null, false);

          if (node != null)

           {

              // Always delete the document with DocumentHelper

               // it handles all the dependencies

              DocumentHelper.DeleteDocument(node, tree, true, true);

              this.lblInfo.Text = "Link '" + node.NodeAliasPath + "' has been deleted.";

           }