Car.cs
 

using System;
namespace MyApplication
{
  class Car 
  {
    string color;
    int maxSpeed;
static void Main(string[] args)
    {
      Car myObj = new Car();
      myObj.color = "red";
      myObj.maxSpeed = 200;
      Console.WriteLine(myObj.color);
      Console.WriteLine(myObj.maxSpeed);
    }
  }
}
Result:
red
200