Fix behavior ObjectCollection for single item contains

[hoyosjs]

Contains for a single item performs a reference-equals, not a semantic equality comparison. Change to use the item's equality definition.

[ghost]

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Issue Details

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Contains for a signle item performs a reference-equals, not a semantic equality comparison. Change to use the item's equality definition.

Author:	hoyosjs
Assignees:	-
Labels:	area-System.Net
Milestone:	-

[geoffkizer]

It looks like we have a similar issue here: https://github.com/dotnet/runtime/blob/main/src/libraries/System.Net.Http/src/System/Net/Http/Headers/ObjectCollection.cs#L123

I don't see any other instances of this in the file, but a second pair of eyeballs would be good...

[hoyosjs]

It looks like we have a similar issue here: https://github.com/dotnet/runtime/blob/main/src/libraries/System.Net.Http/src/System/Net/Http/Headers/ObjectCollection.cs#L123

I don't see any other instances of this in the file, but a second pair of eyeballs would be good...

Noticed that too - there's a few https://source.dot.net/#System.Net.Http/System/Net/Http/Headers/ContentDispositionHeaderValue.cs,104 and in setting date and name in ContentDisposition

[hoyosjs]

/backport to release/6.0-rc2

[github-actions]

Started backporting to release/6.0-rc2: https://github.com/dotnet/runtime/actions/runs/1268272160

[hoyosjs]

@stephentoub@geoffkizer can you please take a look here and if everything looks OK now approve this and the port? Don't want to keep RC2 in delay.

[stephentoub]

LGTM. Thanks.