Visual Basic optional parameters

Hi,
If we call a VB method that can have optional parameters, the syntax error reports an issue and puts the error squiggles under the code even though it compiles and can run.

	Public Class TestSyntaxParse
		
		Private Function MethodWithOptionalParamaters(Optional parameter1 As String = "", Optional parameter2 As String = "", Optional parameter3 As String = "")
			Return True
		End Function
		
		Private Function TestMethodWithOptionalParameters
			Return MethodWithOptionalParamaters(, , ,)
		End Function
		
	End Class

The syntax error will highlight the following line with this issue:

Return MethodWithOptionalParamaters(, , ,)

The syntax error is : "')' expected".

Thanks
Gavin