External File and a Vector

Question

How do I get (read) the values of an external file. Txt and apply a vector? line by line.

Example:

                StreamReader sena = new StreamReader("C:\\paste\\text.txt");

                string linha = "";

                for (n = 0; n < quant; n++)

                {

                    seq[n] = Convert.ToSingle(linha);

                }

Thanks!