problems detecting tab

Question

in the next code I wanna detect the space ' ' and the tab '\t' from text file: //open the file openFileDialog1.ShowDialog(); textBox1.Text = openFileDialog1.FileName; FILE_NAME = openFileDialog1.FileName; System.IO.StreamReader read = new System.IO.StreamReader(textBox1.Text); ListBox.CheckForIllegalCrossThreadCalls = false; //using split funtion sr = new StreamReader(FILE_NAME); char[] delimiterChars = { ' ', '\t' }; string texto; texto = read.ReadToEnd(); string[] words = texto.Split(delimiterChars); foreach (string s in words) { listBox1.Items.Add(s); } the output of the aplication make a list of any string of the file separte by delimiterChars, but if exist a tab in the file write a line; for example the text is: 111111 22 3333 4444 5555555 6666666666666 between 5555555 and 6666666666666 exist two tab characters. the best output should be: 111111 22 3333 4444 5555555 6666666666666 using the my aplication the output is: 111111 22 3333 4444 5555555 6666666666666 erase '\t' and only use the space ' ' of the delimiterChar the output is: 111111 22 3333 4444 5555555 6666666666666 how can I resolve this?? thanks.....