private void pictureBox2_MouseHover(object sender, EventArgs e) { var loginAccess = LoginDB.LoadLoginAccess(); if (loginAccess == null) { return; } if (!loginAccess.KEY_LOG.HasValue) { return; } ToolTip toolTip = new ToolTip(); toolTip.SetToolTip(this.pictureBox2, "Ultimo Accesso " + Environment.NewLine + loginAccess.USER_ID + Environment.NewLine + "ore: " + loginAccess.DT_LOGIN.ToString()); }