Change the MDI child form’s background color when MDI parent clicks

When you create a form as a MDI child , sometimes you want to access the form object to do some modification from MDI parent. Using following mechanism you can change any associate property of the form.

here is a example of changing MDI child’s form background color when MDI parent menu clicks.

private void MDIToolStripMenuItem_Click(object sender, EventArgs e)

{

    Control[] CC = this.Controls.Find("Form1",true);

    foreach (var item in CC)

    {

        if (item.GetType().Name=="Form1" )

        {

            Form1 F = (Form1)item;

            F.BackColor = Color.Aqua;

        }

    }

}