This method works well:

        ' VFP inlist equivalent
        ' expO1 Item where all the items will be tried to look into
        ' expO2 Param array for a list of items
        Public Function Inlist(ByVal toItem As IComparable, ByVal ParamArray toItems() As IComparable) As Boolean
            Return Array.IndexOf(toItems, toItem) <> -1
        End Function

But, if this method is called from a method that has been initiated with Reflection, it will fail. There seems to be a conflict or a bug between the use of Array when being executed when Reflection is active.

Anyone would know a workaround?