为SQL Server填充的多个下拉框创建线程或并行编程

所以我有一个带有扩展方法的poco类，它填充了一个选择列表，如下所示。假设我有10个下拉框，每个扩展方法都进入数据库并填充SelectList。现在我想把每个方法都作为一个线程来启动，这是个好主意吗。。。。我正在寻求能更好地提高性能和速度的建议和事情。线程是否比sql连接更昂贵？我应该每个线程运行两个进程吗，三个、四个。。。？

class person
{
  public person()
  { 
   CrimesListbox1      = CrimesListBox1.populate();
   CrimesListBox2      = CrimesListBox1.populate();
   CrimesListBox3      = CrimesListBox1.populate();
    //so instead of the above way should i..... do the following? 

   Thread t = new Thread (this.CrimesListBox1.populate());          // Kick off a new thread
   t.Start();
   Thread t2 = new Thread (this.CrimesListBox2.populate());   
   t2.Start();
  }
    public SelectList CrimesListBox1{get;set}
    public SelectList CrimesListBox2{get;set}

    public static SelectList populate(this SelectList Object)
        {
                CrimesDataContext LinqCtx = new CrimesDataContext ();
                var CrimesListBox1=
                       (
                        from x in LinqCtx.CrimesListBox1
                        orderby x.Crimes
                        select x
                       );
                Object= 
                        new SelectList
                        (
                            CrimesListBox1, "CrimeId", "CrimeName"
                        );
                return Object;
            }
}//end of the person class