You could do that with a simple Regex, But you should really read some MSDN articles before you try to “use them”
// Match a Regex and Do Stuff
public void showMatch(string input, string expr)
{
MatchCollection mc = Regex.Matches(input, expr);
int num = 0;
foreach (Match m in mc)
{
string tm = m.ToString();
num++;
if (num == 1)
{
// Do Stuff if 1 match.
}
if (num == 2)
{
// Do Stuff if 2 matches.
}
}
}
// showMatch(input, @"(?:[0-9]+){17}");
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solved How do i match something based on the number of strings? [closed]