namespace ProgrammingGuide
{
    // Class definition.
    public class MyCustomClass
    {
        // Class members:
        // Property.
        public int Number { get; set; }
        // Method.
        public int Multiply(int num)
        {
            return num * Number;
        }
        // Instance Constructor.
        public MyCustomClass()
        {
            Number = 0;
        }
    }
    // Another class definition. This one contains
    // the Main method, the entry point for the program.
    class Program
    {
        static void Main(string[] args)
        {
            // Create an object of type MyCustomClass.
            MyCustomClass myClass = new MyCustomClass();
            // Set the value of a public property.
            myClass.Number = 27;
            // Call a public method.
            int result = myClass.Multiply(4);
        }
    }
}

class Program
{
    public MyCustomClass myClass;
    public Program()
    {
     // Create an object of type MyCustomClass.
     myClass = new MyCustomClass();
     // Set the value of a public property.
     myClass.Number = 27;
     // Call a public method.
     int result = myClass.Multiply(4);    
    }
    static void Main(string[] args)    
    {
     Program program = new Program();    
    }
}