How to sort alphabetically?

Question

C++ / C#

There is a code, tell me, please, how to improve it so that you can sort the result (in the column on the right) alphabetically?

The code:

private void btnStat_Click(object sender, EventArgs e)
        {
            string text = tbReadText.Text;
            string temp = "";
            var groups = text.Where(char.IsLetterOrDigit).GroupBy(c => c);
            foreach (var g in groups)
               temp += "Символ: "+ g.Key +" - "+ g.Count()+ " раз"+"\r\n";
            tbStat.Text = temp;
        }

Answer 1

var groups = text.Where(char.IsLetterOrDigit).OrderBy(x => x).GroupBy(c => c);

Answer 2

Add groups.OrderBy(d=>d.Key) to the loop