Question

how can I extract a part from string with “-” separated between the characters?
for example, I want to extract “123” from “123-4567-9012”
or extract “4567” from “123-4567-9012”
or even 9012 from the same string

Answer 1

Just split on the - character and later you can access them. Use string.Split(char[])

string str  = "123-4567-9012";
string[] arr = str.Split('-');

it will result in:

arr[0] = "123";
arr[1] = "4567";
arr[2] = "9012"