Properties vb.net

Hello,

I did convert a piece of C# source to VB.net

public class properties
{
    private static HttpContext Context { get { return System.Web.HttpContext.Current; } }
    private static HttpSessionState Session { get { return Context.Session; } }

    // Get settings from session
    public static string loggedIn { get { return (Session["Properties.loggedIn"] ?? String.Empty).ToString(); } set { Session["Properties.loggedIn"] = value; } }
    public static string userId { get { return (Session["Properties.userId"] ?? String.Empty).ToString(); } set { Session["Properties.userId"] = value; } }
}

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to:

Public Class properties
    Private Shared ReadOnly Property Context() As HttpContext
        Get
            Return System.Web.HttpContext.Current
        End Get
    End Property
    Private Shared ReadOnly Property Session() As HttpSessionState
        Get
            Return Context.Session
        End Get
    End Property

    ' Get settings from session
    Public Shared Property loggedIn() As String
        Get
            Return (If(Session("Properties.loggedIn"), String.Empty)).ToString()
        End Get
        Set(ByVal value As String)
            Session("Properties.loggedIn") = value
        End Set
    End Property
    Public Shared Property userId() As String
        Get
            Return (If(Session("Properties.userId"), String.Empty)).ToString()
        End Get
        Set(ByVal value As String)
            Session("Properties.userId") = value
        End Set
    End Property


End Class

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If i run this i get the following error:
Compilation error

Error message from compiler: BC30201: Expressie expected.

Error in source:

 

Regel 25:     Public Shared Property loggedIn() As String
Regel 26:         Get
Regel 27:             Return (If(Session("Properties.loggedIn"), String.Empty)).ToString()
Regel 28:         End Get
Regel 29:         Set(ByVal value As String)
 

Does any one know what goes wrong?

Thanks in advance.