Principal.cs

using System;
using System.Windows.Forms;

namespace R720VisualizarPaginaWebEnWinForms
{
    public partial class Principal : Form
    {
        public Principal()
        {
            InitializeComponent();

            txtUrl.Text = "https://ortizol.blogspot.com";
        }

        private void btnIr_Click(object sender, EventArgs e)
        {
            webNavegador.Navigate(txtUrl.Text);
        }

        private void btnInicio_Click(object sender, EventArgs e)
        {
            webNavegador.GoHome();
        }
    }
}