Add information about NullReferenceException in ConfigurationRoot ctor

[moojek]

Summary

As in title. Source: https://github.com/dotnet/runtime/blob/049da221a7f0e38eb92ef72fe0611b9b72e513da/src/libraries/Microsoft.Extensions.Configuration/src/ConfigurationRoot.cs

[moojek]

Sorry for close and reopen, I must've misclicked something.

[learn-build-service-prod]

Learn Build status updates of commit ab35a84:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/Microsoft.Extensions.Configuration/ConfigurationRoot.xml	✅Succeeded	View

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[gewarren]

Tagging @dotnet/area-extensions-configuration

[tarekgh]

LGTM.

It is showing some diff in line 239 which unclear to me what exactly change there. Will be good to revert this change.

[moojek]

Hi, sorry for the hassle. Maybe it was some autocrlf from git, I don't know - certainly not my personal change. I already reverted it.

[learn-build-service-prod]

Learn Build status updates of commit 053e95a:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/Microsoft.Extensions.Configuration/ConfigurationRoot.xml	✅Succeeded	View

For more details, please refer to the build report.

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• Post your question in the Learn support channel

[tarekgh]

@moojek looks you reverted the wrong part of the doc :-)

[moojek]

That's what doing it at 1 am in bed does, huh? I'll correct it later today

[moojek]

It was ridiculously hard to correct, but I think all good now @tarekgh :)

[learn-build-service-prod]

Learn Build status updates of commit c00f458:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/Microsoft.Extensions.Configuration/ConfigurationRoot.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 7f94e3f:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/Microsoft.Extensions.Configuration/ConfigurationRoot.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[tarekgh]

Thanks @moojek!