Andrus,

Try this instead:

foreach (Form o in this.MdiChildren)
	o.Close();

~~Bonnie

>I have .net 1.1 WinForms MDI application.
>
>I need to close all MDI child forms.
>I tried
>
>

private void CloseAllForms_Click(object sender, System.EventArgs e){
>
>foreach (Control c in this.Controls) {
>  if (c is MdiClient)
>    ((Form)c).Close();
>  }
>}

>
>but got error
>
>"Unable to cast object of type 'System.Windows.Forms.MdiClient' to type 'System.Windows.Forms.Form'."
>
>Why ?
>
>I also tried c.FindForm().Close();
>but this closes whole application.