How to Enable and Disable the Mdiparent menu strip

Question

Hi Frds,

         

        I open the form from mdiparent for that I am using

                Form1 F1=new Form1(); 

                F1.StartPosition = FormStartPosition.CenterScreen;

                F1.Show();

               menuStrip1.Enabled = false;

Now Form1 will get open. When I close the Form1 Mdiparent menustrip will get enabled.In Form1 Close event I use

 

               MDIParent2 m = new MDIParent2();

               m.menuStrip1.Enabled = true;

But this code is not Working 

 

 How Can I do this.

 

Thank You