Default dictionary containskey is case sensitive, even though documentation says otherwise

[jeff-amos-ssnc]

Type of issue

Other (describe below)

Description

https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringdictionary.containskey?view=net-10.0
"The key is handled in a case-insensitive manner; it is translated to lowercase before it is used."
This appears to be totally incorrect

Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringdictionary.containskey?view=net-10.0

Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System.Collections.Specialized/StringDictionary.xml

Document Version Independent Id

3d6e561e-c817-26e2-1ae4-127d3159e930

Platform Id

4884c600-525c-2208-c41d-c19c47f7d3e9

Article author

@dotnet-bot

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-collections

[gewarren]

@jeff-amos-ssnc Why do you say it's incorrect? Looking at the source code, that is how it's implemented. Note that this is for StringDictionary, not Dictionary<TKey,TValue>.