Knock out BC31902

[jhudsoncedaron]

Imports System.Runtime.CompilerServices

Public Module Program
    <Extension>
    Public Sub AddRange(Of T)([Me] As IList(Of T), <[ParamArray]> elements As IEnumerable(Of T))
	For Each e In elements
		[Me].Add(e)
	Next
    End Sub

    <Extension>
    Public Sub AddRange(Of T)([Me] As List(Of T), <[ParamArray]> elements As T())
	For Each e In elements
		[Me].Add(e)
	Next
    End Sub

    Public Sub Main(args As String())
	Dim l As IList(Of Integer) = New List(Of Integer)
        l.AddRange(New Integer(){1,2,3})
    End Sub
End Module

Raises BC31902

What's going on here is this library is written in VB specifically to spoof-out the C# compiler to allow params IEnumerable<T> to work (and a few other things C# should be able to do but can't but that's for another day). But in further development I found it necessary to call the methods within the implementation and it got kicked out.

The simplest solution is not to treat it as a params argument if it's not an array type, and given the existing error this breaks no code.