private void netAnalysisToolStripMenuItem1_Click(object sender, EventArgs e)
{
Set_step childform = new Set_step(c1);
c1.In_model();
childform.WindowState = FormWindowState.Maximized;
childform.Show();
}
private void dToolStripMenuItem_Click(object sender, EventArgs e)
{
Set_step sp = new Set_step(this);
sp.WindowState = FormWindowState.Maximized;
sp.MdiParent = this;
sp.Show();
}