Run string linq query

query.cs

StringBuilder queryString = new StringBuilder("SELECT [System.Id]" +    
    " FROM WorkItemLinks " +
    " WHERE [Source].[System.WorkItemType] = '" + TFS_TIMESHEET_WORK_ITEM_TYPE + "'" +
    " AND [Source].[System.TeamProject] = '" + TFS_TIMESHEET_PROJECT_KEY + "'" +
    " AND [Source].[System.Id] = " + id 
  );

Query wiQuery = new Query(GetWorkItemStore, queryString.ToString());
WorkItemLinkInfo[] wiTrees = wiQuery.RunLinkQuery();