The method or operation is not implemented
<p>There are two forms. <strong>Form2</strong> is derived from <strong>Form1</strong>.</p>
<p>But I have an issue with <strong>Form2</strong> in design mode as shown on the screenshot below.</p>
<p>If I will comment this <code>this._presenter.Retrive();</code> it will work fine. Whats going on and how to solve the problem?</p>
<p><strong>UPD:</strong>
If I will remove the throw new NotImplementedException(); and will insert, for example, MessageBox.Show(&quot;Test&quot;);, every time I will open Form2 the MessageBox will appears as though I run the application.</p>
<p><a href="https://i.stack.imgur.com/4vMKS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4vMKS.png" alt="enter image description here" /></a></p>
<p><strong>Form2</strong></p>
<pre><code>namespace InheritanceDemo
{
    public partial class Form2 : Form1
    {
        public Form2()
        {
            InitializeComponent();
        }
    }
}
</code></pre>
<p><strong>Form1</strong></p>
<pre><code>namespace InheritanceDemo
{
    public partial class Form1 : Form
    {
        protected IPresenter _presenter;

        public Form1()
        {
            InitializeComponent();
            _presenter = new Presenters();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this._presenter.Retrive();
        }
    }

    public class Presenters : IPresenter
    {
        public void Retrive()
        {
            throw new NotImplementedException();
        }
    }

    public interface IPresenter
    {
        void Retrive();
    }
}
</code></pre>