I am beginner and I have made calculator in C# (Windows Forms) and only one problem occur so plz help me.

Problem is that when I divide 0 / 0 = then my code crashes on this line 

```
m_res /= decimal.Parse(m_store[i + 1].ToString());

else if (m_store[i].ToString() == "/")
{
    //Textbox.Text = "";
    m_res /= decimal.Parse(m_store[i + 1].ToString());
    TextBox2.Text = m_res.ToString();
}

```