UniqueEmail

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        
        public static  void Main(string[] args)
        {
            string[] em={"team1@somewhere.com","team.1+bob@somewhere.com","team1+jill+bob@somewhere.com","team2@somewhere.com","team2@some.where.com","first.m.last@somewhere.com","firstmlast@somewhere.com"};
            //Your code goes here
            Console.WriteLine("Hello, world!");
            
            
     
            
            int c=NumberOfUniqueEmailAddresses(em);
            
            Console.WriteLine(c);
            
        }
        
        public static int NumberOfUniqueEmailAddresses(string[] emails){
            
            int c=0;
            string[] uniqueEmails=new string[emails.Count()];
            
            string domain;
            string nameem;
            
            for (int i=0; i<emails.Count(); i++){
                nameem=emails[i].Substring(0,emails[i].IndexOf("@"));
                domain=emails[i].Substring(emails[i].IndexOf("@")+1);
                nameem=nameem.Replace(".", "");
               // nameem=nameem.Substring(0,nameem.IndexOf('+'));
                if (nameem.IndexOf('+')>0) {
                    nameem=nameem.Substring(0,nameem.IndexOf('+'));
                }
                 
                uniqueEmails[i]=nameem+domain;
                  
            }
            
             for(int i=0; i<uniqueEmails.Count();i++)  
            {  
                bool isDuplicate = false;  
                 
                for(int j=0;j<i;j++)  
                {  
                    if(uniqueEmails[i] == uniqueEmails[j])  
                    {  
                        isDuplicate = true;  
                   
                    }  
                }  
  
                if(!isDuplicate)  
                {  
                   c++;
                      
                }  
               //  Console.WriteLine(uniqueEmails[i]);
            }  
            
            
            return c;
        }
        
        
    }
}