Leetcode ransom letter C ＃ answer

383. Ransom letter
     Here are two strings ：ransomNote and magazine , Judge ransomNote Can it be done by magazine The characters inside make up .

If possible , return true ; Otherwise return to false .

magazine Each character in can only be in ransomNote Used once in .

Example 1：

Input ：ransomNote = “a”, magazine = “b”
Output ：false
Example 2：

Input ：ransomNote = “aa”, magazine = “ab”
Output ：false
Example 3：

Input ：ransomNote = “aa”, magazine = “aab”
Output ：true

Tips ：

1 <= ransomNote.length, magazine.length <= 105
ransomNote and magazine It's made up of lowercase letters
Pass times 193,359 Submit the number 306,645

Below is my AC Code

  public partial class Solution
        {
    
            public static bool CanConstruct(string ransomNote, string magazine)
            {
    
                char[] ramchars = ransomNote.ToCharArray();
                char[] magachars = magazine.ToCharArray();
                List<char> listram = ramchars.ToList<char>();
                List<char> listmaga = magachars.ToList<char>();

                int CountA = listmaga.Count;
                int CountB = listram.Count;
                for (int i = 0; i < CountA; i++)
                {
    
                    char c = listmaga[i];
                    if (listram.Contains(c))
                    {
    
                        listram.Remove(c);
                 
                    }

                }

                if (listram.Count > 0)
                {
    
                    return false;
                }
                return true;
            }

        }