Можно ли в char записать число больше 9? - C#

public static IEnumerable<char[]> Combinations(int length, char startChar, char endChar)
        {
            int numChars = endChar - startChar + 1;
            var s = new String(startChar, length).ToCharArray();
            for (int it = 1; it <= Math.Pow(numChars, length); ++it)
            {
                yield return s;
                for (int ix = 0; ix < s.Length; ++ix)
                    if (ix == 0 || it % Math.Pow(numChars, ix) == 0)
                        s[s.Length - 1 - ix] = (char)(startChar + (s[s.Length - 1 - ix] - startChar + 1) % numChars);
            }
        } 
 
        private void button1_Click(object sender, EventArgs e)
        {
            foreach (var s in Combinations(4, '0', '[B]10[/B]'))
            {
                string z = new string(s);
                listBox1.Items.Add(z);
            }
        }