字符串交替出现

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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();           }             } }