Maintain history of products viewed by user in ASP.Net

thanks Mudassar sir ,and niravjp  for ur response

i have solved this issue

code something like this

for example a  product  gridview with checkbox

save recent  product details in session  where checkbox checked

  DataTable dt = new DataTable();

        dt.Columns.Add("ProductID", typeof(int));
        dt.Columns.Add("ProductName", typeof(string));
        dt.Columns.Add("CategoryID", typeof(int));
        dt.Columns.Add("UnitPrice", typeof(decimal));

        foreach (GridViewRow gvRow in GridView1.Rows)
        {
            CheckBox checkbox = (CheckBox)gvRow.Cells[0].FindControl("CheckBox1");
            if (checkbox.Checked)
            {
                DataRow row = dt.NewRow();
                row["ProductID"] = gvRow.Cells[1].Text;
                row["ProductName"] = gvRow.Cells[2].Text;
                row["CategoryID"] = gvRow.Cells[3].Text;
                row["UnitPrice"] = gvRow.Cells[4].Text;
                dt.Rows.Add(row);
            }
        }
        Session["ProductsTable"] = dt;
        Response.Redirect("~/Default2.aspx");

on second page

if (Session["ProductsTable"] != null)
        {
            DataTable dt = (DataTable)Session["ProductsTable"];

            GridView1.DataSource = dt;
            GridView1.DataBind();
            Session["ProductsTable"] = null;
        }