void Button5Click(object sender, EventArgs e)
{
bool editar = false;
string ideditar = "";
FormAlumnos1 formalumno = new FormAlumnos1(editar, ideditar);
formalumno.MdiParent = this.MdiParent;
this.Close();
formalumno.Show();
}
void Button6Click(object sender, EventArgs e)
{
bool editar = true;
string ideditar = dgridalumnos.SelectedRows[0].Cells[0].Value.ToString();
FormAlumnos1 formalumno = new FormAlumnos1(editar, ideditar);
formalumno.MdiParent = this.MdiParent;
this.Close();
formalumno.Show();
}