6QufcYzq

1
2        private void button1_Click(object sender, EventArgs e)
3        {
4            string[] gmail = GetGmails(txtGmail.Text);
5            for (int i = 0; i < gmail.Count(); i++)
6            {
7                gmail[i] += "@gmail.com";
8            }
9            txtEmail.Lines = gmail;
10        }
11
12        /// <summary>
13        /// Gets a list of all possible dot tricked gmails.
14        /// </summary>
15        /// <param name="acc">The account name without @gmail.com.</param>
16        /// <returns>All the possible doted gmails without @gmail.com</returns>
17        public string[] GetGmails(string acc)
18        {
19            if (acc.Length > 1 && acc.Length < 31)
20            {
21                string head = acc.Substring(0, 1);
22                string tail = acc.Substring(1, acc.Length - 1);
23                string[] tails = GetGmails(tail);
24                string[] ret = new string[tails.Length * 2];
25                int iRet = 0;
26                foreach (string t in tails)
27                {
28                    ret[iRet] = head.ToString() + t;
29                    iRet++;
30                    ret[iRet] = head.ToString() + '.' + t;
31                    iRet++;
32                }
33                return ret;
34            }
35            else
36            {
37                string[] ret = { acc };
38                return ret;
39            }
40        }