using System;
namespace Project1
{
    class hebin
    {      
        public void sb(char[] str1, char[] str2)
        {
            int i, j=0;
          for (i = 0; i < str1.Length; i++)
            {
                if (str1[i] == str1[i + 1])
                    i++;
                else
                { str2[j] = str1[i]; j++; }
                for (int k = 0; k < str2.Length; k++)
                { Console.WriteLine(str2[k]); }
            }
        }
        class Program
        {

            static void Main()
            {
                int i;
                char[] s1; char[] s2;
                hebin xubin = new hebin();
                for (i = 0; i<100;i++ )
                 s1[i] = Console.ReadKey().KeyChar;
                xubin.sb(s1, s2);

            }
        }

    }
}

感谢大家的智慧，这题问题是合并一个字符串相邻的字符

大虾们，为什么程序可以运行但输入字符串后敲击回车没反应，以下是代码：
using System;
namespace Project1
{
    class hebin
    {
        public void sb(char[] str1, char[] str2)
        {
            int i, j = 0;
            for (i = 0; i < str1.Length; i++)
            {
                if (str1[i] == str1[i + 1])
                    i++;
                else
                { str2[j] = str1[i]; j++; }
            }
            for (int k = 0; k < str2.Length; k++)
            { Console.WriteLine(str2[k]); }

        }
    }
    class Program
    {

        static void Main()
        {
            int i;
            char[] s1; char[] s2;
            s1 = new char[100];
            s2 = new char[100];
            hebin xubin = new hebin();
            for (i = 0; i < 100; i++)
                s1[i] = Console.ReadKey().KeyChar;

            xubin.sb(s1, s2);

        }
    }

}