designPatternGuru/DesignPatternGuru/State/States/ConcreteStateA.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace State.States
{
    internal class ConcreteStateA : State
    {
        public override void Handle1()
        {
            Console.WriteLine("ConcreteStateA handles request1.");
            Console.WriteLine("ConcreteStateA wants to change the state of the context.");
            _context.TransitionTo(new ConcreteStateB());
        }

        public override void Handle2()
        {
            throw new NotImplementedException();
        }
    }
}