-Static Members
-So far, we have used non-static fields in our classes
-This means, that each instance of the class holds its own version of the field, and changing the value of it only affects that instance:
-class MyAwesomeClass
-{
-public int MyProperty { get; set; }
-}
-class Program
-{
-static void Main(string[] args)
-{
-MyAwesomeClass instance1 = new MyAwesomeClass();
-MyAwesomeClass instance2 = new MyAwesomeClass();
-instance1.MyProperty = 100;
-instance2.MyProperty = 200; // instance1.MyProperty is still 100
-}
-}
-Static Members (continued)
-Likewise, non-static class methods _have to _ be called through an instance:
-class MyAwesomeClass
-{
-public void PrintText(string text) { Console.WriteLine(text); }
-}
-class Program
-{
-static void Main(string[] args)
-{
-MyAwesomeClass instance = new MyAwesomeClass();
-instance.PrintText("Hello World"); // Outputs "Hello World"
-MyAwesomeClass.PrintText("Hello World"); // Results in an error
-}
-}
-
-Static fields are shared between all instances of a class
-Let's declare "MyProperty" property with the __static __ keyword. Now it can be referenced through the class type name, but not through the instance, as shown below:
-class MyAwesomeClass
-{
-public static int MyProperty { get; set; } = 100;
-}
-class Program
-{
-static void Main(string[] args)
-{
-MyAwesomeClass instance = new MyAwesomeClass();
-Console.WriteLine(MyAwesomeClass.MyProperty); // Outputs "100"
-Console.WriteLine(instance.MyProperty); // Results in an error
-}
-}
-
-Static Members - Example
-In this example, a static field is used for keeping count on how many times the class has been instantiated:
-class Person
-{
-public static int totalPersons = 0;
-private string name;
-public Person(string personName) // Person Constructor
-{
-name = personName;
-++totalPersons;
-}
-public void PrintInfo()
-{
-Console.WriteLine("This person is called " + name + ".");
-Console.WriteLine("There are " + totalPersons + " persons total.");
-}
-}
-Static Members - Example (continued)
-Now let's instantiate a couple of persons and print their info:
-class Program
-{
-static void Main(string[] args)
-{
-Person steve = new Person("Steve");
-Person wendy = new Person("Wendy");
-steve.PrintInfo();
-wendy.PrintInfo();
-}
-}
-
-Static Methods
-Methods can also be static
-What happens when you try to call a non-static method from a static method?
-class Program
-{
-void PrintHelloName(string name)
-{
-Console.WriteLine("Hello, " + name);
-}
-static void Main(string[] args)
-{
-PrintHelloName(); // Will throw an error
-}
-}
-
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