What is the best way to store a checkbox list in SQL server

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SQL

C#3.5

I have a checkbox list that looks like this

<asp:CheckBoxList ID="chkBox" runat="server">
<asp:ListItem Text="Text" Value="Text"/>
<asp:ListItem Text="Email" Value="Email"/>
<asp:ListItem Text="Mail" Value="Mail"/>
<asp:ListItem Text="Calendar" Value="Calendar"/>


I'm not sure what the best way to store this in my SQL database is. I know I can look through the values to append to a string.

But if I want to reload this form and have the checkbox's that were checked off, checked automatically, how should I store this info in my database?

What I have tried:

Here is how I appended these values to a string

string interests = string.Empty;
foreach (ListItem item in this.chkBox.Items)
if (item.Selected)
interests += item + ",";

But I don't think this is ideal. I don't really know how i would pull this out from my table and display it in the form.