Making Anagrams-Final, C#

Making Anagrams-Final

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Collections;
namespace Rextester
{
    public class Program
    {
        private void MyMethod(Dictionary<char,int> myDictionary) { 
    
            
            
         }
        
        public static void Main(string[] args)
        {
            //Your code goes here
           string a = Console.ReadLine();
           string b = Console.ReadLine();  
            
           char[] aO = a.Trim().Replace(" ","").ToLower().ToCharArray();
           Array.Sort(aO);  
            
           char[] bO = b.Trim().Replace(" ","").ToLower().ToCharArray();
           Array.Sort(bO);   
            
            
            ArrayList aOrignal = new ArrayList();
            aOrignal.AddRange(aO);
            
            ArrayList bOrignal = new ArrayList();
            bOrignal.AddRange(bO);
            
           Dictionary<char, int> aDic = new Dictionary<char, int>();
           foreach(char item in aOrignal)
            {
              
               if (aDic.ContainsKey(item))
                  aDic[item]++;
                else
                    aDic.Add(item, 1);
            }
           
            
             Dictionary<char, int> bDic = new Dictionary<char, int>();
            foreach(char item in bOrignal)
            {
               if (bDic.ContainsKey(item))
                  bDic[item]++;
                else
                    bDic.Add(item, 1);
            }      
            
               foreach (KeyValuePair<char, int> kvp in aDic.ToList())
               { 
                   if(aOrignal.Contains(kvp.Key) && bOrignal.Contains(kvp.Key)){
                            aDic[kvp.Key] -=1;
                            bDic[kvp.Key] -=1;
                       for(var i=1; i<kvp.Value;i++){
                       if(aDic.ContainsKey(kvp.Key) && bDic.ContainsKey(kvp.Key)){
                           if(aDic[kvp.Key] > 0 && bDic[kvp.Key] >0 ){
                            aDic[kvp.Key] -=1;
                            bDic[kvp.Key] -=1;
                           }
                       }
                       }

}
                      
              
               }
            int count = 0;
              foreach (KeyValuePair<char, int> kvp in bDic)
               { 
                  count += kvp.Value;
                     
              
               }
             foreach (KeyValuePair<char, int> kvp in aDic)
               { 
                 count += kvp.Value;
                        
              
               }
            
       Console.WriteLine(count);

//end
        }
    }
}


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