Q:

How to enable toolStrip1 from child form

I am trying to enable/visible to true when I close childform. here is my sample code.  I would appreciate for your help. 
//This code works perfectly 
private void TSBRekrytering_Click(object sender, EventArgs e)
        {
            FrmRekrytering RekryteringForm = new FrmRekrytering();
            RekryteringForm.MdiParent = this;
            RekryteringForm.Show();

            //Hide toolstrip for the FrmMain or MDI Parent Form
            TSFrmMain.Visible = false;
        }

But when I close FrmRekrytering I want to enable back the toolstrip for main form which is the MDI form.
Once again thank you.

A:

Add this code in Parent form
 private void TSBRekrytering_Click(object sender, EventArgs e)
    {
        FrmRekrytering RekryteringForm = new FrmRekrytering();
        RekryteringForm.Show(this);
        TSFrmMain.Visible = false;
    }

    public string toolstripvalue
    {
        get
        {
            return toolstripvalue;
        }
        set
        {
            toolStrip.Visible = Convert.ToBoolean(value);
        }
    }

& this code in child form i.e. FrmRekrytering 
  protected override void OnFormClosing(FormClosingEventArgs e)
    {
        ((MDIParent1)this.Owner).toolstripvalue = "true";
    }

