private void exercício2ToolStripMenuItem_Click(object sender, EventArgs e)
{
frmExercício2 frm2 = new frmExercício2();
frm2.MdiParent = this;
frm2.WindowState = FormWindowState.Maximized;
frm2.Show();
}
private void exercício2ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form fc = Application.OpenForms["frmExercício2"];
if (fc != null)
{
fc.Close();
}
frmExercício2 objFrm2 = new frmExercício2();
objFrm2.MdiParent = this;
objFrm2.WindowState = FormWindowState.Maximized;
objFrm2.Show();
}