Make it anagram - using string operation, remove a char from a string - for any char in both two strings

MakeItAnagram8.cs

using System;
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 */
         string str1 = Console.ReadLine();
            string str2 = Console.ReadLine();

            for(int iLoop = 0;iLoop < str1.Length;iLoop++)
            {
                int indexVal = str2.IndexOf(str1.Substring(iLoop, 1));
                if (indexVal >= 0)
                {
                    str2 = str2.Remove(indexVal, 1);
                    str1 = str1.Remove(iLoop, 1);
                    iLoop--;
                } 

            }
            Console.Write(str2.Length + str1.Length); 
    }
}