Find odd and even numbers in Array

using System;
using System.Collections.Generic;

public class HelloWorld{
  public static void Main(string[] args){
    string a = Console.ReadLine().Trim().ToLower();
    int[] arr = new int[]{1,2,3,4,5,65,67,7,8};
    List<int> evenlist = new List<int>();
    List<int> oddlist = new List<int>();
    for(int i=0; i<arr.Length; i++){
      if(arr[i]%2==0){
        evenlist.Add(arr[i]);
      }
      else{
        oddlist.Add(arr[i]);
    }
    }
    if(a == "odd"){
      foreach(int n in oddlist){
        Console.WriteLine(n);
      }
    }
    else if(a=="even"){
      foreach(int n in evenlist){
        Console.WriteLine(n);
      }
    
  }
}
}