Filter Out List with another list using LINQ

Question

Hi I\'m having difficulty finding an answer to my question here, so I figured I\'d just ask. I have to lists of classes, ServiceItem, and ServiceDetailsClass. I want to filter o

Answer 1

You're making a new object and then checking the list to see if that exact object/instance is in it (i.e. because it's an object, it's comparing the reference).

Instead, you need to look for overlapping IDs.

Something like this should work:

List<ServiceItem> serviceItems;
List<ServiceItemDetails> serviceItemDetails;

var result = serviceItemDetails.Where(sid => serviceItems.Any(si => si.ID == sid.ID))

In English: "The collection of ServiceItemDetails where the list of service items has an item with the same ID"