Static Classes

A static class is a class that contains only static members and cannot be instantiated.  You declare a class as static using the static keyword.

A static class:

• Can only have static members (can't contain instance members)
• Cannot be instantiated
• Cannot serve as the type of a variable
• Cannot serve as a parameter type
• Cannot inherit from another class
• Cannot serve as a parent of another class

Example :

namespace ConsoleApplication1

{

    class Program

    {               

        static void Main(string[] args)

        {

            Employee e1 = new Employee("keshav", 23);

            Employee e2 = new Employee("Raj", 24);

            EmployeeMethods.SpeakALot(e1);

            Console.WriteLine(EmployeeMethods.MarriedName(e1,e2));

            Console.ReadLine();

        }        

    }

    public static class EmployeeMethods

    {

        private static int NumSpeak = 5;

        public static void SpeakALot(Employee d)

        {

            for (int i = 1; i <= NumSpeak; i++)

            {

                d.EmployeeSpeak();

            }

        }

        public static string MarriedName(Employee d1, Employee d2)

        {

            return d1.Name + d2.Name;

        }

    }

    

    public partial class Employee

    {

        public string Name { get; set; }

        public int Age { get; set; }

        

        public Employee(string name, int age)

        {

            Name = name;

            Age = age;

        }

        public void EmployeeSpeak()

        {

            Console.WriteLine("Hello");

        }

    }

}

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