When adding primitive collections of IEnumerable returned by LINQ without casting them to List, Array, etc., the internal method Snapshot(IEnumerable source, ValueComparer elementComparer) is invoked after the SaveChanges() call, which checks if the input parameter is an IList.
In the scenario mentioned, this method throws an exception: "The type some_type cannot be used as a primitive collection because it is not an array and does not implement 'IList'. Collections of primitive types must be arrays or ordered lists."
Type of issue
Missing information
Description
When adding primitive collections of IEnumerable returned by LINQ without casting them to List, Array, etc., the internal method Snapshot(IEnumerable source, ValueComparer elementComparer) is invoked after the SaveChanges() call, which checks if the input parameter is an IList.
In the scenario mentioned, this method throws an exception: "The type some_type cannot be used as a primitive collection because it is not an array and does not implement 'IList'. Collections of primitive types must be arrays or ordered lists."
It may be beneficial to note this peculiarity.
Page URL
https://learn.microsoft.com/en-us/ef/core/what-is-new/ef-core-8.0/whatsnew#primitive-collections
Content source URL
https://github.com/dotnet/EntityFramework.Docs/blob/main/entity-framework/core/what-is-new/ef-core-8.0/whatsnew.md
Document Version Independent Id
97203c5d-fe52-b71e-dcb3-71c9492b4e04
Article author
@ajcvickers