Session State
Add data to String array and create an session
Ex:
Details.aspx Page
String[] str = new String[] { TextBoxName2.Text , TextBoxMobile2.Text, TextBoxId2.Text, TextBoxAddress2.Text };;
Session["TextData"] = str;
Extract The Values From Session, In Page final.aspx page
String[] RecievedDate = (String[])Session["TextData"];
TextBoxName2.Text = RecievedDate[0];
TextBoxMobile2.Text = RecievedDate[1];
TextBoxId2.Text = RecievedDate[2];
TextBoxAddress2.Text = RecievedDate[3];