Redirect after inserting record into database in ASP.Net using C#

I want to redirect page after insert record into database

below is button save code.

protected void Save_Click(object sender, EventArgs e)
{ 
    if (DDLCus.SelectedValue == "0")
    {
        Response.Write("<script>alert('Please Input Customer Name')</script>");
    } 
    else
    { 
        using (SqlCommand cmd = new SqlCommand("SP_insert_Order", con))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@Action", "Master");
            cmd.Parameters.AddWithValue("@Order_ID", lbid.Text);
            cmd.Parameters.AddWithValue("@Order_date", DateTime.Now.ToString());
            cmd.Parameters.AddWithValue("@C_ID", DDLCus.SelectedValue);
            cmd.Parameters.AddWithValue("@Order_Amount", txtamount.Text);
            cmd.Parameters.AddWithValue("@Delivery_Date",txtdeliverydate.Text);
            cmd.Parameters.AddWithValue("@Order_Remakrs", txtremarks.Text);
 
            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();
            insertcheck();
        }
        {
            foreach (GridViewRow row in gvv.Rows)
            { 
                if (!string.IsNullOrEmpty((row.FindControl("I_ID") as Label).Text.Trim()))
                {
                    int i_id = Convert.ToInt32((row.FindControl("I_ID") as Label).Text.Trim());
                    TextBox txtsize = (row.FindControl("Size") as TextBox);
                    Insert((Decimal.Parse(txtsize.Text).ToString()), i_id);
                }
            }
        }
    }
}