private void formularioToolStripMenuItem_Click(object sender, EventArgs e)
{
FormSingleton formSingleton = FormSingleton.Mostrar();
formSingleton.MdiParent = this;
formSingleton.Show();
}
public static FormSingleton Mostrar()
{
if (instancia == null)
{
instancia = new FormSingleton();
}
return(instancia);
}
private void FormSingleton_FormClosed(object sender, FormClosedEventArgs e)
{
instancia = null;
}