using Microsoft.TeamFoundation.VersionControl.Client;
using Microsoft.TeamFoundation.WorkItemTracking.Client;
 
// create a new work item linked to an existing item in version control
static void CreateLinkedWorkItem(String teamProject, String workItemType)
{
    using (var tfs = TeamFoundationServerFactory.GetServer(_ServerUri))
    {
        var workItemStore = (WorkItemStore)tfs.GetService(typeof(WorkItemStore));
 

using Microsoft.TeamFoundation.WorkItemTracking.Client;
 
// populate a TreeView with the work item queries for a particular team project
treeView.Nodes.Clear();
 
foreach (QueryItem queryItem in teamProject.QueryHierarchy)
{
    GetNodesForQueryFolder(queryItem as QueryFolder, treeQueryView.Nodes);
}