using System;

public class Vehicle {
  private string _type;
  public string Type {
    get { return _type; }
    set {
      if (value == String.Empty) {
        Console.WriteLine("The vehicle type cannot be empty");
      }
      else _type = value;
    }
  }

  private int _numTires;
  public int NumTires {
    get { return _numTires; }
    set {
      if (value < 1) {
        Console.WriteLine("The vehicle must have at least one tire");
      }
      else _numTires = value;
    }
  }
}

public class Tutorial {
    public static void Main() {
        Vehicle myRide = new Vehicle();
        myRide.Type = "Motorcycle";
        myRide.NumTires = 2;
        Console.WriteLine(myRide.Type);
        Console.WriteLine(myRide.NumTires);
        myRide.Type = String.Empty;
        Console.WriteLine(myRide.Type);
        myRide.NumTires = 0;
        Console.WriteLine(myRide.NumTires);
    }
}