Question

I have following vb.net code and i am getting syntax error in it

Update

 Protected Sub OpenLogin_Click(ByVal src As Object, ByVal e As CommandEventArgs)
        Dim StrUri As String = e.CommandArgument.ToString()
        Dim openid As New OpenIdRelyingParty()
        Dim b = New UriBuilder(Request.Url)
        With Key
            .Query = ""
        End With
        'var b = new UriBuilder(Request.Url) { Query = "" };

        Dim req = openid.CreateRequest(StrUri)

        Dim fetchRequest = New FetchRequest()
        fetchRequest.Attributes.AddRequired(WellKnownAttributes.Contact.Email)
        fetchRequest.Attributes.AddRequired(WellKnownAttributes.Name.First)
        fetchRequest.Attributes.AddRequired(WellKnownAttributes.Name.Last)

        req.AddExtension(fetchRequest)

        req.RedirectToProvider()

    End Sub

Now the error in code is “Key is Not declared” What should i do now for this

Answer 1

Two problems:

1. The Key reserved word is only to be used when identifying a multi-part key for grouping using Enumerable.GroupBy. It is not required for setting object properties inline with their constructor.

2. You are experiencing a problem whereby you have separated the With decorator onto a new line, which is syntactically incorrect because you are now treating it as a With block, which means that every dot access will target the variable immediately following the With statement. You need to use a line continuation character or put With on the same line as the object constructor:

Ex 1

Dim b = New UriBuilder(Request.Url) With {
            .Query = ""
        }

Ex 2

Dim b = New UriBuilder(Request.Url) _
            With { .Query = "" }

EDIT:

You cannot use this syntax with a Visual Studio 2005/.NET 2.0 project. Just construct the object then initialize the property:

Dim b As New UriBuilder(Request.Url)
b.Query = ""