Vb.net Code syntax error - vb.net

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:
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.
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 = ""

Answer 2

AFAIK, you don't need the curly braces.
With Something
.Property1 = True
.Property2 = "Inactive"
' And so on
End With
UPDATE
With Key
.Query = ""
End With
Why do you need a With clause here anyway ? The above is syntactically equivalent to
Key.Query = ""

Answer 3

Declare the Key variable or else remove it from your code.