How to auto hide the data on the gridview after 24 hours?

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C#

ASP.NET

Gridview

i've search on the interned on how to hide the cell on the gridview but my problem is how to auto hide the data on the gridview after 24hours

Can anyone help me on how to hide the data after 24 hours

What I have tried:

Here's my code to display the gridview and the data

DataTable dt = new DataTable();

            dt.Columns.Add("Subject", typeof(string));
            dt.Columns.Add("Sender", typeof(string));
            dt.Columns.Add("DateCreated", typeof(string));
            dt.Columns.Add("EmailHeader", typeof(string));

            foreach (Item item in email.EmailList)
            {
                dt.Rows.Add(item.Subject, item.DisplayTo, item.DateTimeCreated, item.Body);

                GridView1.DataSource = dt;
                GridView1.DataBind();
  
            }

and here's the gridview

<pre>  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" CellPadding="4" OnRowCommand="GridView1_RowCommand" Height="423px">
            <Columns>
                <asp:BoundField DataField="DateCreated" HeaderText="Date and Time" />
                <asp:TemplateField HeaderText="Receiver">
                    <ItemTemplate>
                       <asp:LinkButton runat="server" CommandArgument='<%# Eval("Sender") %>' Text='<%# Eval("Sender") %>'></asp:LinkButton> <%--OnClientClick="document.getElementById('id01').style.display='block'; return false"--%>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Subject" HeaderText="Email Error" />
                
                <asp:TemplateField HeaderText="Email Body">
                    <ItemTemplate>
                       <asp:Button ID="txtItemBody"  runat="server" Text='<%# Eval("EmailHeader") %>' Width="100px" Enabled="false"/>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="View Email ">
                    <ItemTemplate>
                       <asp:Button runat="server"  CommandName="Select" CommandArgument="<%# Container.DataItemIndex %>" Text="View Email" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
            <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
            <PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
            <RowStyle BackColor="whitesmoke" ForeColor="#0a0014" />
            <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#0a0014" />
            <SortedAscendingCellStyle BackColor="#FEFCEB" />
            <SortedAscendingHeaderStyle BackColor="#AF0101" />
            <SortedDescendingCellStyle BackColor="#F6F0C0" />
            <SortedDescendingHeaderStyle BackColor="#7E0000" />
        </asp:GridView>