打开文件，读取TXT

  /// <summary>
        /// 打开文件 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            //OpenFileDialog fileDialog = new OpenFileDialog();
            //fileDialog.Multiselect = true;
            //fileDialog.Title = "请选择文件";
            //fileDialog.Filter = "所有文件(*.*)|*.*";
            //if (fileDialog.ShowDialog() == DialogResult.OK)
            //{
            //    //文件路径
            //    filePath = fileDialog.FileName;
            //}
            //if (filePath!=null)
            //{
            //    Read2(filePath);
            //}

            Read2(filePath);
        }

　　

读取 文件

public void Read2(string path)
        {
            StreamReader sr;
            try
            {
                sr = new StreamReader(path, Encoding.Default);
            }
            catch (Exception)
            {
                return;
            }
          
            while ((line = sr.ReadLine()) != null)
            {
               Console.WriteLine(line.ToString());
    
            }


        }