System.Text.Json: Custom Constructor Support

[endeffects]

Please provide support for custom constructors and allow to specify the constructor with an attribute.

[ahsonkhan]

cc @steveharter

[Gnbrkm41]

https://github.com/dotnet/corefx/issues/38569#issuecomment-503566048

For the 3.0 release, there is no planned additional support for calling a non-default constructor during deserialization. That would have to be done by a custom converter.

[layomia]

Sufficiently similar to https://github.com/dotnet/corefx/issues/40399 - closing as duplicate.

Edit: similar to #29895.

[gfoidl]

@layomia you created a endless-loop 😉
(the link points to the current issue itself)
Did you mean #29895?

[layomia]

@gfoidl yes, thank you!

[etghanibahman]

Is there any temporary solution for this ?!

[manne]

@etghanibahman I have implemented a functionality supporting "custom" constructors. For details read https://github.com/dotnet/corefx/issues/38569#issuecomment-574886051