Is there a function that returns index where RegEx match starts?

Question

I have strings of 15 characters long. I am performing some pattern matching on it with a regular expression. I want to know the position of the substring where the IsM

Answer 1

Regex.Match("abcd", "c").Index

2

Note# Should check the result of Match.success, because its return 0, and can confuse with Position 0, Please refer to Mark Byers Answer. Thanks.