not able to execute

using System;

namespace Address
{
class Program
{
static void Main(string[] args)
{
while (true)
{
Console.Write("Your Name: ");
string name = Console.ReadLine();

Console.Write("Street No and Street Name: ");
string streetNoAndName = Console.ReadLine();

Console.Write("City: ");
string city = Console.ReadLine();

Console.Write("State: ");
string state = Console.ReadLine();

Console.Write("Zip code: ");
string zipCode = Console.ReadLine();

Console.WriteLine();

Console.WriteLine("City: {0}", city);

Console.WriteLine("State: {0}", state);
Console.WriteLine();

Console.WriteLine("OR");
Console.WriteLine();

Console.WriteLine("Zip code: {0}", zipCode);

Console.WriteLine("\n******************************");
}
Console.ReadKey();
}
}
}

using System;
class DebugSeven2
{
  static void Main()
  {
  string addressee = "Ms. Brooke Jefferson";
  int zipCode = 60007;
  string cityAndState = "Elk Grove, IL";
  AddressMethod(addressee, zipCode);
  Console.WriteLine("-----------------------");
  AddressMethod(addressee, cityAndState);
  Console.WriteLine("-----------------------");
  }
  private static void AddressMethod(string person)
  {
  Console.WriteLine("To : {0}", person);
 Console.WriteLine("Zip: {0}"  num);
  }
  private static void AddressMethod(string person, int city)
  {
 Console.WriteLine("To : {0}", person);
 Console.WriteLine("{0}, city);
  }
}

before you was trying to pass a integer value to string