Question

How to use static variable in class with C#

Answer 1

using System;

namespace class_static_variables
{
	public class StaticTest
	{
        public static int static_n;
        public int x;

        public StaticTest()
		{
			x++; 
			static_n++;
		}
		static public int GetStatic_n()
		{
			//x = 30; // Error: static function can access only static variables
            static_n++;
			
            return static_n;
		}
		public void Show ()
		{
			Console.WriteLine("x = {0} static_n = {1}", x, static_n);
		}
	}
	class Class1
	{
		static void Main(string[] args)
		{
			StaticTest st1 = new StaticTest();
			st1.Show(); // x = 1 static_n = 1

			StaticTest st2 = new StaticTest();
			st2.Show(); // x = 1 static_n = 2

			StaticTest st3 = new StaticTest();
			st3.Show(); // x = 1 static_n = 3

            Console.WriteLine("StaticTest.GetStatic_n() = {0}", StaticTest.GetStatic_n()); 
            //StaticTest.GetStatic_n() = 4
		}
	}
}

70+ SQL courses for beginners and professionals