>>Well I tried this

>>for (int i = this.Controls.Count; i >= 0; i--)
>>{
>>if ((string)this.Controls[i].Tag == "removable")
>>{
>>this.Controls.RemoveAt(i);
>>}
>>}

>>and still no luck. The count is always equal to 1.

Please try this one:

            List<Control> lstCtrl2Remove = new List<Control>();
            foreach( Control ctrl2Chk in this.Controls )
                if (ctrl2Chk.Tag != null && ctrl2Chk.Tag.ToString() == "removable")
                    lstCtrl2Remove.Add( ctrl2Chk );

            foreach( Control ctrl2Remove in lstCtrl2Remove )
                ctrl2Remove.Visible = false;   // this.Controls.Remove( ctrl2Remove )

HTH