在foreach语句中打印字符串中的所有字符

Question

using System;

namespace Palindrome
{
    class Program
    {
        static void Main(string[] args)
        {
            // Declare the variables
            string backwards = string.Empty;
            string phrase = " ";
            Console.Write($"Enter a string and we'll check to see if it's a palindrome. ");
            phrase = Convert.ToString(Console.ReadLine());
            Console.WriteLine($"\nYou entered: {phrase} ");

            Console.Write($"\nIn reverse, your string is: ");

            char[] charArr = phrase.ToCharArray();

            int increment = 1;
            char reverse;
            foreach (char c in charArr)
            {
                backwards = Convert.ToString(reverse = charArr[charArr.Length - increment]);
                increment++;
                Console.Write($"{backwards}");

            }

            Console.WriteLine($"\n{backwards}");
            if (String.Equals(phrase, backwards))
            {
                Console.WriteLine($"\nThis is a palindrome!");
            }
            else
            {
                Console.WriteLine($"\nThis is not a palindrome");
            }
        }
    }
}

在这段代码中，我试图测试用户提交的字符串是否是回文（单词的前后拼写相同。）我可以使字符串向后拼写，但是当我尝试测试“向后”变量表示用户提交的字符串中的第一个字符，而不是整个字符串的反向拼写。任何建议都会有所帮助！