StringDictionary is not supported by Microsoft.Extensions.Configuration.Binder.ConfigurationBinder

[Kaelum]

The StringDictionary class is a prefect representation of a Dictionary that is represented by an IConfiguration interface, as the keys are case insensitive in both objects.

I propose that either of the following options be implemented:

1. The StringDictionary class implements the IDictionary<string, string> interface.
2. The Microsoft.Extensions.Configuration.ConfigurationBinder.BindInstance() method adds support for StringDictionary.

This would make it much simpler, and cleaner, when using IConfiguration.

Additionally, there is a fatal flaw in the current design as Microsoft.Extensions.Configuration.ConfigurationBinder.CreateInstance() does not create a case insensitive dictionary, thus lookups for keys that vary only in case, fail.

[ghost]

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Issue Details

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The StringDictionary class is a prefect representation of a Dictionary that is represented by an IConfiguration interface, as the keys are case insensitive in both objects.

I propose that either of the following options be implemented:

1. The StringDictionary class implements the IDictionary<string, string> interface.
2. The Microsoft.Extensions.Configuration.ConfigurationBinder.BindInstance() method adds support for StringDictionary.

This would make it much simpler, and cleaner, when using IConfiguration.

Additionally, there is a fatal flaw in the current design as Microsoft.Extensions.Configuration.ConfigurationBinder.CreateInstance() does not create a case insensitive dictionary, thus lookups for keys that vary only in case, fail.

Author:	Kaelum
Assignees:	-
Labels:	area-Extensions-Configuration, untriaged
Milestone:	-

[iSazonov]

StringDictionary will be marked as obsolete #889

[Kaelum]

@iSazonov I responded in the other thread, but you are aware that this, and several other of these specialized classes, are heavily used by ASP.NET, correct? This class alone is used as the basis for the entire configuration system.

[iSazonov]

@Kaelum This can be actively used, but it does not reject the possibility of an new alternative based on generic Dictionary.

[davidfowl]

ASP.NET Core doesn't use any of the specialized collections