I want to Pass Session Name In another page?

Question

When i click on login button then pass username in my another page?

 

My Code Like This:

Login Page:
protected void Page_Load(object sender, EventArgs e)
    {
        {
            if (Request.QueryString["out"] != null)
            {
                Session.RemoveAll();
                Response.Redirect("Login.aspx");
            }
        }
    }
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter("select Name from userLogin where Name='" + txtUserName.Text + "' AND Password='" + txtUserPassword.Text + "'", @"Data Source =.\SQLExpress;Initial Catalog = TourPortal; Integrated Security = True");

        da.Fill(dt);
        if (dt.Rows.Count == 0)
        {
            msg = "Please Enter Valid Username And Password";
        }
        else
        {

            Session.Add("UserName", dt.Rows[0][0].ToString());
            Response.Redirect("Dashboard.aspx");

        }

another Page:

<a href="#" data-toggle="dropdown" aria-expanded="false">

                                    <span class="hidden-xs">----------Need Session Name---------------<i class="fa fa-angle-down pull-right"></i></span>

                                    <img src="resources/img/icons/icon-user.png" class="user-image" alt="User Image">
                                </a>
                                <ul class="dropdown-menu user-menu animated flipInY">

                                    <li class="divider"></li>
                                    <li><a href="Default.aspx?out=1" id="logout"><i class="ti-power-off"></i> Log Out</a></li>
                                </ul>