Getting A Selected Object from GridView

I am fairly new to ASP.NET. I have a term project; the issue I am facing is described as follows:

• I have a page named Contacts.
• I have a class called User.
• I have an ArrayList of User which is bound as a datasource to a Gridview in Contacts.

What I want to do is that when I click on a contact from the gridview, I want a new page to open which will give details of the selected contact. For that I need the contact in a Session Variable.

My problem is that I do not know how to "extract" the selected object from the GridView. I tried the event SelectedIndexChanged but that isn't working because the response isn't redirected to the new page.

I have considered making one Column of the GV a Hyperlink Field, but that will redirect response to a new page only. It doesn't store the selected contact in a session variable.

Edit: (code)

HTML

<asp:GridView ID="GVV2" runat="server" AutoGenerateColumns="False" 
Height="25px"style="margin-right: 4px" Width="616px" 
    onselectedindexchanged="GVV2_SelectedIndexChanged"  >
    <Columns>
        <asp:TemplateField>
            <HeaderStyle CssClass="checkBoxCell" />
            <ItemStyle CssClass="checkBoxCell" />
            <ItemTemplate>
        <asp:CheckBox ID="chk" runat="server" />
        </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="FullName_" HeaderText="Name">
        <HeaderStyle CssClass="SenderCell" />
        <ItemStyle CssClass="SenderCell" />
        </asp:BoundField>
        <asp:HyperLinkField DataTextField="EmailID_" HeaderText="Email ID" 
            NavigateUrl="~/ViewContact1.aspx" >
        <HeaderStyle CssClass="emailCell" />
        <ItemStyle CssClass="emailCell a.decor" />
        </asp:HyperLinkField>
    </Columns>
</asp:GridView>

Code Behind

public partial class Contacts1 : System.Web.UI.Page
{
    Storage1 STO;
    String currentUser;
    Users1 selectedUser;
    protected void Page_Load(object sender, EventArgs e)
    {
        Initiation();
        GVV2.DataSource = Contact.getContactList(currentUser, STO);
        GVV2.DataBind();
    }
    private void Initiation()
    {
        if (Session["SignInUser"] == null)
            Session["SignInUser"] = currentUser;
        else currentUser= (String)Session["SignInUser"];`

        if (Session["Storage"] == null)
            Session["Storage"] = STO;
        else
        {
            STO= new Storage1();
            STO = (Storage1)Session["Storage"];
        }

    }

    protected void GVV2_SelectedIndexChanged(object sender, EventArgs e)
    {
        Session["SelectedContact"]=GVV2.SelectedRow;
        Response.Redirect("ViewContact1.aspx");
    }
}