How to pass TextBox value to another page using QueryString Parameter on Button click in ASP.Net

Here i am passing the TextBox value from one page to another page. on second page i have created one property for retrieving QueryString values

First.aspx:

<form id="form1" runat="server">
    <div>
        <asp:TextBox runat="server" ID="txtId" />
        <asp:Button Text="Get Information based on EmployeeID" OnClick="GetInformation" runat="server" />
    </div>
    </form>

C#:

protected void GetInformation(object sender, EventArgs e)
{
    Response.Redirect("Grid.aspx?EmployeeId=" + this.txtId.Text.Trim());
}

VB.Net:

Protected Sub GetInformation(ByVal sender As Object, ByVal e As EventArgs)
    Response.Redirect("Grid.aspx?EmployeeId=" & Me.txtId.Text.Trim())
End Sub

Second.aspx:

 <form id="form1" runat="server">
    <div>
    <asp:GridView ID="gvEmployees" runat="server" AutoGenerateColumns="false">
            <Columns>
                <asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" />
                <asp:BoundField DataField="FirstName" HeaderText="FirstName" />
                <asp:BoundField DataField="LastName" HeaderText="LastName" />
            </Columns>
        </asp:GridView>
    </div>
    </form>

C#:

        private int EmployeeId
        {
            get
            {
                return (Request.QueryString["EmployeeId"] == null ? 0 : int.Parse(Request.QueryString["EmployeeId"]));
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                PopulateEmployees();
            }
        }

        public void PopulateEmployees()
        {
            string constr = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
            string sqlStatment = "SELECT EmployeeID,FirstName,LastName FROM Employees WHERE EmployeeID = @EmployeeId";
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand(sqlStatment, con))
                {
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        cmd.Parameters.AddWithValue("@EmployeeId", this.EmployeeId);
                        DataSet ds = new DataSet();
                        da.Fill(ds);
                        this.gvEmployees.DataSource = ds;
                        this.gvEmployees.DataBind();
                    }
                }
            }

        }

VB.Net:

    Private ReadOnly Property EmployeeId As Integer
        Get
            Return (If(Request.QueryString("EmployeeId") Is Nothing, 0, Integer.Parse(Request.QueryString("EmployeeId"))))
        End Get
    End Property

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        If Not Me.IsPostBack Then
            PopulateEmployees()
        End If
    End Sub

    Public Sub PopulateEmployees()
        Dim constr As String = ConfigurationManager.ConnectionStrings("ConString").ConnectionString
        Dim sqlStatment As String = "SELECT EmployeeID,FirstName,LastName FROM Employees WHERE EmployeeID = @EmployeeId"

        Using con As SqlConnection = New SqlConnection(constr)

            Using cmd As SqlCommand = New SqlCommand(sqlStatment, con)

                Using da As SqlDataAdapter = New SqlDataAdapter(cmd)
                    cmd.Parameters.AddWithValue("@EmployeeId", Me.EmployeeId)
                    Dim ds As DataSet = New DataSet()
                    da.Fill(ds)
                    Me.gvEmployees.DataSource = ds
                    Me.gvEmployees.DataBind()
                End Using
            End Using
        End Using
    End Sub

Thank You.