BaseLibS.Utils.StringUtils.Concat

concatT.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Test {
    public class Program {
        static void Main() {
            Console.WriteLine(Concat(",",new List<string> {"a","b","c"}));
        }

        public static string Concat<T>(string separator, IEnumerable<T> o) {
            if (o == null) {
                return "";
            }
            IEnumerator<T> oe = o.GetEnumerator();
            if (!oe.MoveNext()) return "";
            StringBuilder s = new StringBuilder();
            s.Append(oe.Current);
            while (oe.MoveNext()) {
                s.Append(separator + oe.Current);
            }
            return s.ToString();
        }
    }
}