Working With Types With Linq In VB, C# - Dim LoTupleSetDifference = LoTupleKeys.Except(loTupleExistingKeys)

Say I create two sets of tuples like so:

Dim losSPResults As List(Of spGetDataResults) = m_dcDataClasses.spGetData.ToList
Dim loTupleKeys = From t In losSPResults Select t.key1, t.key2

[CODE].....................

Now I want to perform set operations on these two lists like so:

Dim loTupleSetDifference = loTupleKeys.Except(loTupleExistingKeys)

Obviously, Linq can't perform a comparator on sets if it doesn't know the sets have uniform definitions, so it will give me this build error:

Option Strict On disallows implicit
conversions from
'System.Collections.Generic.IEnumerable(Of
< anonymous type>)' to
'System.Collections.Generic.IEnumerable(Of
< anonymous type>)'.

How do I work with the declaration of these sets to make them mesh?

Still getting the same compile error:

'*** If we have initialized the list of tools, check to make sure it's up to date Dim loTupleDatabaseTools = From tt In lottTorqueTools _Select StationIndex = tt.station_index, SlotNumber = tt.slot_number

[CODE]...............

Error is here:

Dim loTupleSetDifference = loTupleDatabaseTools.Except(loTupleToolObjects)

Error 5Option Strict On disallows
implicit conversions from

[CODE]........................