Requesting For QueryString In Variable?

I am trying to get the id from a url and send it to the client side this is what I did. This is my url : [URL]

Code behind
Public Partial Class Edit
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
End Sub
Private _myId As String = Request.QueryString("id")
Public Property myId() As String
[Code] .....

Error
Request is not available in this context
This is also what I get when I move the private prop to page_load()
"private " is not valid on local variable declaration -

Here is the answer
Public Partial Class Edit
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
MyIdVal = Request.QueryString("id")
End Sub
Private _myIdVal As String
Public Property MyIdVal() As String
[Code] .....