为什么我的string.Remove（）没有按预期工作？

Question

我试图解决这个问题，即找出两个单词是否是彼此的字谜（如果我们重新排列一个字符串，它匹配第二个字符串）。

基于Remove single character from a string我建立了自己的功能：

public class AreAnagrams
{
        public static bool AreStringsAnagrams(string FirstString, string SecondString)
        {
            if (FirstString == null || b == null)
                return false;

            if (FirstString.Length != SecondString.Length)
                return false;

            for (int i = 0; i < SecondString.Length; i++)
            {
                if (FirstString.IndexOf(SecondString[i]) == -1)
                    return false;
                else
                    FirstString.Remove(FirstString.IndexOf(SecondString[i]), 1); // Here it does not modify FirstString, even if I put 2nd parameter as 1
            }

            if (FirstString.Length > 0)
                return false;

            return true;
        }

    public static void Main(string[] args)
    {
        Console.WriteLine(AreStringsAnagrams("neural", "unreal"));
    }
}

在我的手表上，我看到FirstString仍然是原样。问题是什么？拜托，谢谢

Answer 1

将结果分配给 Cos(Theta) = Length(P - M) / Length(P - P0) = DM / L D = Length(C - P) = L / Cos(Theta) = L * L / DM and finally C = P - L^2 * (P0 - M) / DM^2 Coeff = L_Squared / DM_Squared ///5 C.X = P.X - Coeff * (P.X - M.X) ///6 C.Y = P.Y - Coeff * (P.Y - M.Y) ///7

FirstString