Make It Anagram - Sort two string first, and then, using two pointers - sliding forward

MakeItAnagram7.cs

using System;
using System.Linq;
using System.Collections.Generic;
using System.IO;
class Solution
{
    static void Main(String[] args)
    {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        var str1 = Console.ReadLine().ToCharArray().OrderBy(e => e).ToArray();
        var str2 = Console.ReadLine().ToCharArray().OrderBy(e => e).ToArray();

        var deletionCount = 0;
        int n = 0;
        int m = 0;
        while (true)
        {
            if (n >= str1.Length || m >= str2.Length)
                break;

            if (str1[n] < str2[m])
            {
                deletionCount++;
                n++;
            }
            else if (str1[n] > str2[m])
            {
                deletionCount++;
                m++;
            }
            else
            {
                m++;
                n++;
            }
        }

        deletionCount += str2.Length - m + str1.Length - n;
        Console.WriteLine(deletionCount);
    }
}