Stateless programmering og shared methods

Kig på følgende klasse:

Public Class DataTextFile

    Private Shared file As System.IO.FileInfo
    Private Shared valuepairs As New System.Collections.Specialized.ListDictionary

    Private Shared Sub ReadFile()
        If (file Is Nothing) Or (Not file.Exists) Then
            Throw New System.IO.FileNotFoundException("File not specified, or does not exist when trying to read file contents in DataTextFile class.")
        End If

        Dim s As System.IO.StreamReader = file.OpenText
        Dim l As String = s.ReadLine

        Do While Not l Is Nothing
            Dim t() As String = l.Split("=")
            If Not t.Length = 2 Then Throw New ArgumentOutOfRangeException("Data file had illegal values when trying to read data file in DataTextFile class.")
            valuepairs.Add(t(0), t(1))
            l = s.ReadLine
        Loop
    End Sub

    Public Shared Sub SetInputFile(ByVal filename As String)
        file = New System.IO.FileInfo(filename)
    End Sub

    Public Shared Sub SetInputFile(ByVal inputfile As System.IO.FileInfo)
        file = inputfile
    End Sub

    Public Shared ReadOnly Property InputFile() As System.IO.FileInfo
        Get
            Return file
        End Get
    End Property

    Public Shared ReadOnly Property GetValue(ByVal key As String) As String
        Get
            ReadFile()
            Return valuepairs(key)
        End Get
    End Property

End Class

Hvis jeg i en windows-applikation benyttede SetInputFile-metoden ved programopstart, kunne jeg være temmelig sikker på, at den shared variabel file ville forblive det samme gennem hele kørslen af programmet.

Hvis jeg på en aspx-side benytter SetInputFile-metoden, så kan jeg vel ikke være så sikker længere, hvis siden skifter...eller hvad? Nu har Microsoft jo gjort meget for at gøre ASP.NET mindre stateless... så hvad kan man forvente?