No Accessible 'Count' Accepts This Number Of Type Arguments?

I'm getting a very odd problem with a conversion from C# to VB (VB10 - .NET 4 target):

C#: IEnumerable<string> test = new string[] { "abc", "def", "ghi" };

int i = test.Count<string>();

VB:Dim test As IEnumerable(Of String) = New String() { "abc", "def", "ghi" }

Dim i As Integer = test.Count(Of String)()

the last line results in a compile error "overload resolution failed because no accessible 'Count' accepts this number of type arguments"

[Code]...