Remove obsolete properties, methods, and classes for 3.0

[erikmav]

Add BinaryFormattter serialize-deserialze testing across versions, and correct serialization property bag names broken by modernization (#124).

Commented out obsolete tag for FixFlags.Mdc as the obsolete tags in MDC.cs are commented out.

[erikmav]

For #125

[FreeAndNil]

Thanks a lot.
Just one question.

I've noted the breaking changes in #125 (comment)

[FreeAndNil]

Thanks.

[FreeAndNil]

@erikmav because of https://learn.microsoft.com/en-us/dotnet/standard/serialization/binaryformatter-security-guide we think about removing ISerializable and [Serializable] (at least for netstandard).
What do you think?
Where are you using this serialization for log4net objects?

[erikmav]

Unneeded by me. During the 3.0 work it was not clear that serialization could be removed, so I added the newer extensive unit tests including ensuring back compat. Removing it along with all the tests is fine by me.

…

________________________________ From: Jan Friedrich ***@***.***> Sent: Thursday, September 5, 2024 3:29 PM To: apache/logging-log4net ***@***.***> Cc: Erik Mavrinac ***@***.***>; Mention ***@***.***> Subject: Re: [apache/logging-log4net] Remove obsolete properties, methods, and classes for 3.0 (PR #138) @erikmav<https://github.com/erikmav> because of https://learn.microsoft.com/en-us/dotnet/standard/serialization/binaryformatter-security-guide we think about removing ISerializable and [Serializable] (at least for netstandard). What do you think? Where are you using this serialization for log4net objects? — Reply to this email directly, view it on GitHub<#138 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AAHYCQQIPR2XEAPCGCLDYDLZVDLLLAVCNFSM6AAAAABFNMA7OKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGMZSG4ZTSNJUGE>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[FreeAndNil]

@erikmav thanks for your feedback.
We have only three failing tests, when removing it.
The two from you and PropertiesDictionaryTest.
When we remove the old serialization we will maybe switch to DataContractSerializer and adjust the tests.

[vy]

Hello @erikmav! Log4net crew is actively looking for user feedback and, new members. 😉 @FreeAndNil and I would really appreciate it if we can have a video call with you at your convenience. If that sounds like something you want to participate, would you mind reaching out to me with an email, please?