IConfiguration append additional property

[eiriktsarpalis]

Side note related to same problem in different area of the stack: Even if this solves the problem for System.Text.Json, I have the same problem for Microsoft.Extensions.Options when binding an options class with a polymorphic list, to an IConfiguration section. In this case the a json file is first read by ConfigurationBuilder.AddJsonFile("appsettings.json") and ends up as essentially key value pairs. The descriminator property is now a key value pair in the IConfiguration. When materialising IOptions from this IConfiguration, there is now no JSON converter involved, so if I want to handle polymorphic lists I have to implement a seperate solution here, and it seems like there isn't a way to take control of binding yet.

Originally posted by @dazinator in #56297 (comment)

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Issue Details

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Side note related to same problem in different area of the stack: Even if this solves the problem for System.Text.Json, I have the same problem for Microsoft.Extensions.Options when binding an options class with a polymorphic list, to an IConfiguration section. In this case the a json file is first read by ConfigurationBuilder.AddJsonFile("appsettings.json") and ends up as essentially key value pairs. The descriminator property is now a key value pair in the IConfiguration. When materialising IOptions from this IConfiguration, there is now no JSON converter involved, so if I want to handle polymorphic lists I have to implement a seperate solution here, and it seems like there isn't a way to take control of binding yet.

Originally posted by @dazinator in #56297 (comment)

Author:	eiriktsarpalis
Assignees:	-
Labels:	area-System.Text.Json, untriaged
Milestone:	-

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Tagging subscribers to this area: @maryamariyan
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Issue Details

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Side note related to same problem in different area of the stack: Even if this solves the problem for System.Text.Json, I have the same problem for Microsoft.Extensions.Options when binding an options class with a polymorphic list, to an IConfiguration section. In this case the a json file is first read by ConfigurationBuilder.AddJsonFile("appsettings.json") and ends up as essentially key value pairs. The descriminator property is now a key value pair in the IConfiguration. When materialising IOptions from this IConfiguration, there is now no JSON converter involved, so if I want to handle polymorphic lists I have to implement a seperate solution here, and it seems like there isn't a way to take control of binding yet.

Originally posted by @dazinator in #56297 (comment)

Author:	eiriktsarpalis
Assignees:	-
Labels:	area-Extensions-Options, untriaged
Milestone:	-

[eiriktsarpalis]

@dazinator I've forked your comment into a separate issue for easier review.

[eiriktsarpalis]

Looks like you've already filed a second issue in #56302. Closing in favor of that one.