如何读取文本文件

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//记事本内容，名TEST.TXT
张山,男,20080921
王五,男,20070109
李四,男,20050109
//

//通用类用于读TEST.TXT
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;

using Model;
namespace test
{
public class test
{

        public static IList<EmployeesInfo> Read_Employees(string FileName)
        {
            IList<EmployeesInfo> _list = new List<EmployeesInfo>();
            try
            {
                using (TextReader sr = new StreamReader(FileName, Encoding.GetEncoding("GB2312")))
                {
                    String input;
                    while ((input = sr.ReadLine()) != null)
                    {

                        EmployeesInfo _obj = new EmployeesInfo();
                        string[] temp = input.Split(new char[] { ',' });
                        string datetime = temp.GetValue(2).ToString();
                        datetime = datetime.Insert(4, "-");
                        datetime = datetime.Insert(7, "-");
                        DateTime dt = DateTime.Parse(datetime);

                        _obj.NAME= temp.GetValue(0).ToString();
                        _obj.SEX = temp.GetValue(1).ToString();

                        _obj.STARTWORKTIME = dt;

                        _list.Add(_obj);

                    }
                    sr.Close();
                }
                return _list;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

}
}
//

//按钮事件，调用方法，读取文本TEST.TXT
     protected void btnqr_Click(object sender, EventArgs e)
        {
            string filename = @"E:/TEST.TXT";
            IList<EmployeesInfo> _list = test.Read_Employees(filename);

        }