fix: problem with json serializer option with C# generator

[JFCote]

Description

• Fix generation problem at 2 places when using C# generator with json serializer option

• Missing "s" for a class
• Missing "value." when deserializing.

[coveralls]

Pull Request Test Coverage Report for Build 5870359342

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.194%

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Totals
Change from base Build 5829889931:	0.0%
Covered Lines:	5261
Relevant Lines:	5564

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💛 - Coveralls

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[JFCote]

@jonaslagoni Please note that this will only fix the compilation. I tried the fixed code and it crash with exception at runtime. But that is another story and I don't think I have currently the knowledge to fix it myself.

[jonaslagoni]

What problems are you facing @JFCote? or exceptions?

[asyncapi-bot]

🎉 This PR is included in version 1.8.11 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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[asyncapi-bot]

🎉 This PR is included in version 2.0.0-next.25 🎉

The release is available on:

• npm package (@next dist-tag)
• GitHub release

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