A value in myListingsUpdatedIn24Hrs was equal to myLS. So , Yes it is.

But the explanation that I got was:

<div class="post-text">

The

ListingSyncItem

type doesn't override

Equals

, so

List<T>.Remove

doesn't know that the item to remove is "equal" to the item in your list.

Simply overriding

Equals

and

GetHashCode

appropriately (to check for the equality of

ListNumber

and

Status

, presumably, and build a hash code based on those) should fix the problem.

For

RemoveAll

, you're providing a predicate. That doesn't use

ListingSyncItem.Equals

, which is why it's working.

</div>