Convert C# linq query to VB

See more:

C#

VB

LINQ

I'm trying to convert a bit of code from C# to VB.NET that's looking for a specific set of class members and I've got it almost completely worked out except for a little Linq query that uses some C# syntax with which I'm unfamiliar:

var members = entityType.GetTypeInfo().GetMembers(bindingFlags)
	.Where(m => m.MemberType == MemberTypes.Property || m.MemberType == MemberTypes.Field)
	.Select((m, i) => (member: m, positions: (user: resolver.GetPosition(m), builtin: i)))
	.Where(x => x.positions.user != -1)
	.OrderBy(x => x.positions)
	.Select(x => x.member)
	.ToArray();

What I have tried:

The first .Where() bit makes sense and converts to:

.Where(Function(m) m.MemberType = MemberTypes.Property Or m.MemberType = MemberTypes.Field)

But, it's the first .Select() piece that I don't understand. It seems to be defining some labels (or perhaps a temporary structure of some sort) that it can pass along to the next .Where() clause. I've tried to define a function where I declare some variables with these names, but I can't figure out how to declare them:

.Select(Function(m, i)
			Dim member = m
			Dim positions As New Dictionary(Of Integer, Integer)(Resolver.GetPosition(m), i)
		End Function)

The types should be correct (both Integers), but obviously the attempt to just create a Dictionary(Of Integer, Integer) doesn't give me the ability to move into the Next .Where() or the .OrderBy() clauses with the "names" propegating.

Do I need to create/declare a Private Structure or something in the Class that I can use in that query?