Question

I have a class Customer which contains the property Extensions which in turn contains the property Any.

I tried to do:

Dim room  = If(customer.Extensions.Any.ElementAt(0).InnerText, Nothing)

but it threw an error when it did not find an Extension element in the incoming xml. I thought it would return nothing once it saw that the first expression was Nothing. Do I have to do a multiple if statement in this case?

Answer 1

Yes, you do have to check for at least one element. So what you could do would be:

Dim a = customer.Extensions.Any.FirstOrDefault()
Dim room = If(a Is Nothing, Nothing, a.InnerText)

Depending on the type of customer.Extensions.Any, you could do this:

Dim room = If(customer.Extensions.Any.Count > 0, customer.Extensions.Any(0), Nothing)