https://school.programmers.co.kr/learn/courses/30/lessons/120849
using System;
public class Solution {
public string solution(string my_string) {
string answer = "";
char[] my_char = my_string.ToCharArray();
for(int i=0; i<my_char.Length; i++){
if(my_char[i]=='a'|| my_char[i]=='e'|| my_char[i]=='i' || my_char[i]=='o' || my_char[i]=='u') {
continue;
} else{
answer +=my_char[i];
}
}
return answer;
}
}