There are several restrictions that apply to static methods:
A static method does not have a this reference.
A static method can directly call only other static methods.
A static method cannot directly call an instance method of its class.
A static method must directly access only static data.
You can't directly access a non-static variable from within a static method.
You can't directly call a non-static method from within a static method.
using System;
class StaticDemo {
// a static variable
public static int val = 100;
// a static method
public static int valDiv2() {
return val/2;
}
}
class MainClass {
public static void Main() {
Console.WriteLine("Initial value of StaticDemo.val is "
+ StaticDemo.val);
StaticDemo.val = 8;
Console.WriteLine("StaticDemo.val is " + StaticDemo.val);
Console.WriteLine("StaticDemo.valDiv2(): " +
StaticDemo.valDiv2());
}
}
Initial value of StaticDemo.val is 100
StaticDemo.val is 8
StaticDemo.valDiv2(): 4