How to clear control in webpages?

            foreach (Control item in this.form1.Controls)

            {

             

               

                if (item is TextBox)

                {

                    TextBox t = (TextBox)item;

                    t.Text = "";

                }

                else if(item is ListControl)

                {

                    // all list controls are cleared ,rblist,checkboxlist,listbox,Dorpdownlist

                    ListControl li = (ListControl)item;

                    li.Items.Clear();

                   

                }

            }