Question

Is there any way to select items in a list that aren’t contained in another? For example:

list1 = From t In list1 Where Not list2.Contains(t.column1)

That gives me the error:

Value of type 'Integer' cannot be converted to '<anonymous type>'

which makes sense, since list2.Contains is expecting the same type as list2. However, the list types are different. I want only to select based on column comparisons.

Answer 1

Have you tried something like this?

list1 = From t In list1 Where Not list2.Any(l => t.column1 = l.column1 AndAlso t.column2 = l.column2)

I am unsure how efficient it would be, but I think it should work for you.