Error "Unable to evaluate the expression"
<p>I have a problem with a debugging tools named as memory.I am opening this tool <em>Debug tool → Windows → Memory → Memory 1</em>.</p>

<p>This is my whole code:</p>

<pre><code>using System;
using System.Windows.Forms;

namespace CSharpCompleteTutorial
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    public delegate decimal Hesaplama(int adet);
    private void Form1_Load(object sender, EventArgs e)
    {
        Hesaplama del = Fiyat;
        del += KDVFiyat;
        MessageBox.Show(del.Invoke(5).ToString());
    }

    public decimal Fiyat(int sayi)
    {
        return sayi * 10.5m;
    }

    public decimal KDVFiyat(int sayi)
    {
        decimal kdvharicfiyat = sayi * 10.5m;

        return kdvharicfiyat + kdvharicfiyat * 0.18m;
    }
}
}
</code></pre>

<p>I have to use simply memory tool.But it makes me an error as in the image.</p>

<p><img src="https://i.stack.imgur.com/odM0k.png" alt="Image of error"></p>