// Tree provider

CMS.TreeEngine.TreeProvider provider = new CMS.TreeEngine.TreeProvider(CMS.CMSHelper.CMSContext.CurrentUser);

// Get document with specified site, aliaspath and culture

TreeNode node = provider.SelectSingleNode(CMS.CMSHelper.CMSContext.CurrentSite.SiteName, "/News/MyFirstNews", "en-us");

if (node != null)

{

   // Delete the document

   node.Delete();

}