<asp:Repeater ID="Repeater1" runat="server">
                <ItemTemplate>
                    <%# DataBinder.Eval(Container.DataItem, "[\"FullName\"]") %>
                    <br />
                    <asp:Repeater ID="Repeater2" runat="Server" DataSource='<%# ((DataRowView)Container.DataItem).Row.GetChildRows("ParentChild") %>'>
                        <ItemTemplate>

                                <%# DataBinder.Eval(Container.DataItem, "[\"FullName\"]") %>
                            <br />
                        </ItemTemplate>
                    </asp:Repeater>
                </ItemTemplate>
            </asp:Repeater>  


protected void Page_Load(object sender, EventArgs e)
    {
        string strSql = "SELECT [ID], [Parent_ID], FullName, FirstName, LastName FROM Individual";
        SqlConnection conn = new SqlConnection("Data Source=localhost,2819;Initial Catalog=Connections;Integrated Security=True");
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter();
        SqlCommand cmd = new SqlCommand(strSql, conn);
        cmd.CommandType = CommandType.Text;

        da.SelectCommand = cmd;
        da.Fill(ds);

        da.Dispose();
        ds.DataSetName = "Individuals";
        ds.Tables[0].TableName = "Individual";
        DataRelation relation = new DataRelation("ParentChild",
        ds.Tables["Individual"].Columns["ID"],
        ds.Tables["Individual"].Columns["Parent_ID"],
        true);
        relation.Nested = true;
        ds.Relations.Add(relation);


        Repeater1.DataSource = ds.Tables["Individual"];
        Repeater1.DataBind();
        conn.Close();

    }