Mouse hover font size change on label

Question

Novice here, wanted to try to resize text in a label with a simple mouse over, but everything I seem to be trying isn't exactly working. Am I forgetting a property in the label? or is it the code?

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

    private void OnMouseEnter(object sender, EventArgs e)
    {
        label1.Font = new Font(label1.Font.Name, 20, FontStyle.Regular);
    }

    private void OnMouseLeave(object sender, EventArgs e)
    {
        label1.Font = new Font(label1.Font.Name, 9, FontStyle.Regular);
    }

    private void label1_Click(object sender, EventArgs e)
    {
    }
}

Answer 1

You just forgot to attach your events didn't you:

public Form1()
{
     InitializeComponent();

     label1.MouseEnter += OnMouseEnter;
     label1.MouseLeave += OnMouseLeave;
}

Or you can just do that through the designer.

Answer 2

更改ui属性时，请确保调用该控件的Refresh（）或Invalidate（）方法