using System.Linq;
using System.Text;

namespace ExctractMonitorLogTool {
    class Class1 {

        public static void XXX() {
            int[] array = new[] { 0, 1, 2, 3, 4 };

            //1
            var list = new List<string>();
            foreach (var i in array) {
                list.Add(i.ToString());
            }

            //2
            Func<int, string> del = ConvertToString;
            var result = array.Select(del);

            //3　そもそも関数を書く必要性がなくね
            Func<int, string> del2 = (int i) => { return i.ToString(); };
            var result2 = array.Select(del2);

            //4
            var result3 = array.Select((int i) => { return i.ToString(); });

            //5
            var result4 = array.Select(i => i.ToString());



            string[] array2 = new[] { "0", "1", "2", "3", "4" };

        }

        private static string ConvertToString(int i) {
            return i.ToString();
        }

        private static IEnumerable<string> Select<int>(int[] array) {

        }
    }
}

//arrayをintからstringに変換する方法。
 public static void XXX() {
            int[] array = new[] { 0, 1, 2, 3, 4 };

            //1
            var list = new List<string>();
            foreach (var i in array) {
                list.Add(i.ToString());
            }

            //2
            Func<int, string> del = ConvertToString;
            var result = array.Select(del);

            //3
            Func<int, string> del2 = (int i) => { return i.ToString(); };
            var result2 = array.Select(del2);

            //4
            var result3 = array.Select((int i) => { return i.ToString(); });

            //5
            var result4 = array.Select(i => i.ToString());



            string[] array2 = new[] { "0", "1", "2", "3", "4" };

        }

        private static string ConvertToString(int i) {
            return i.ToString();
        }

        private static IEnumerable<string> Select<int>(int[] array) {
            List<string> list = new List<string>();
            foreach (int item in array) {

            }
            return list;
        }
}