DEPENDENCY INJECTION

using System;

namespace Dependency_injection
{
    class Program
    {
        static void Main(string[] args)
        {
            businessclass obj = new businessclass(new studentservice());
            businessclass ob = new businessclass(new teacherservice());
            
        }
        public class businessclass
        {
            private Iservice iservice;
            public businessclass(Iservice _iservice)
            {
                this.iservice = _iservice;
                this.iservice.GetFirstName();
                this.iservice.GetLastName();
            }
        }
        public interface Iservice
        {
            void GetFirstName();
            void GetLastName();

        }
        public class studentservice: Iservice
        {
            public void GetFirstName()
            {
                Console.WriteLine("sowmya");
            }
            public void GetLastName()
            {
                Console.WriteLine("Tellapragada");
            }
        }
        public class teacherservice : Iservice
        {
            public void GetFirstName()
            {
                Console.WriteLine("Madhavi");
            }
            public void GetLastName()
            {
                Console.WriteLine("Gadicherla");
            }
        }
    }
}