Test depends on abstraction and does not depend on concrete

    /// <summary>
    ///  Tests depend on abstraction and not on concrete 
    /// </summary>
    public interface IPeople
    {
    

        void run();
        void eat();
        void say();
    }

    public class Student : IPeople
    {
    
        public void eat()
        {
    
            throw new NotImplementedException();
        }

        public void run()
        {
    
            throw new NotImplementedException();
        }
        public void say()
        {
    
            MessageBox.Show($"{
      (new StackTrace()).GetFrame(0).GetMethod().ReflectedType.Name}"+":"+$"{
      System.Reflection.MethodBase.GetCurrentMethod().Name}");
        }
    }

// 1.(new StackTrace()).GetFrame(1) // 0 Method for itself ;1 To call a method 
//2.(new StackTrace()).GetFrame(1).GetMethod().Name; //  Method name 
//3.(new StackTrace()).GetFrame(1).GetMethod().ReflectedType.Name; //  Class name 

    public class Teacher : IPeople
    {
    
        public void eat()
        {
    
            throw new NotImplementedException();
        }

        public void run()
        {
    
            throw new NotImplementedException();
        }
        public void say()
        {
    
            MessageBox.Show($"{
      (new StackTrace()).GetFrame(0).GetMethod().ReflectedType.Name}" + ":" + $"{
      System.Reflection.MethodBase.GetCurrentMethod().Name}");

// 1.(new StackTrace()).GetFrame(1) // 0 Method for itself ;1 To call a method
//2.(new StackTrace()).GetFrame(1).GetMethod().Name; // Method name
//3.(new StackTrace()).GetFrame(1).GetMethod().ReflectedType.Name; // Class name