how can I refresh a form from another. in Windows Forms

Question

how can I refresh a form from another.

I have made properties in the program.

  eg:

Main Form, Sub Form

H main opens Sub But I want the value of the sub to the display in Main without having to close and then re opened (Main_Load). through the properties I have made,

But at that time by one second to make renewal.

The Main has a TxtMain.

H Sub has 1 Textbox and a Button.

private void BtnSave_Click (object sender, EventArgs e)

         {

             Properties.Settings.Default ["Price"] = Convert.ToDouble (TxtSUB.Text);

             Properties.Settings.Default.Save ();

         }

 

So when you close the form OnClose () I want to get the property value and puts it in TxtMain.Text. with Main.Refresh () not my work.