字符串交替出现

using System;

namespace leecode1
{
    class Program
    {
        static void Main(string[] args)
        {
            string outString= string.Empty;
            
            string s1 = "abc";

            string s2 = "pqruc";

            for (var i = 0; i < Math.Max(s1.Length, s2.Length); i++)
            {
                outString += (i < s1.Length ? s1[i].ToString() : "") + (i < s2.Length ? s2[i].ToString() : "");
            }
            Console.WriteLine(outString);
            Console.ReadKey();

        }




    }
}