streamreader

openFileDialog1.ShowDialog();
textBox1.Text = openFileDialog1.FileName;
string fname = openFileDialog1.FileName;
TextReader trs = new StreamReader(@fname);
String s=trs.ReadLine();
s=s.ToString();
while (s != null)
{
  String x = "";

  for (int i = 0; i < s.Length; i++)
  {
    if(s[i]!='.')//add the required special characters along with it
      x += s[i];
  }
  s = x;
  s = trs.ReadLine();
  conn.Open();
  SqlCommand cmd = new SqlCommand("insert into C_word (Words,Category) values('" + s +"','" + comboBox1.SelectedText + "')",conn);
  cmd.ExecuteNonQuery();
  conn.Close();