Principal.cs

using System;
using System.Drawing;
using System.Drawing.Text;
using System.Windows.Forms;

namespace R801FuentesInstaladas
{
    public partial class Principal : Form
    {
        public Principal()
        {
            InitializeComponent();
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            using (InstalledFontCollection familiaFuentes = new InstalledFontCollection())
            {
                int margenSuperior = 10;

                foreach (FontFamily familia in familiaFuentes.Families)
                {
                    try
                    {
                        Label lblFuente = new Label();
                        lblFuente.Text = familia.Name;
                        lblFuente.Font = new Font(familia, 14);
                        lblFuente.Left = 10;
                        lblFuente.Width = pnlFuentes.Width;
                        lblFuente.Top = margenSuperior;

                        pnlFuentes.Controls.Add(lblFuente);

                        margenSuperior += 30;
                    }
                    catch (Exception exception)
                    {
                        Console.WriteLine(exception);
                    }
                }
            }
        }
    }
}