Type of issue

Other (describe below)

Description

The remarks made on this page related to an empty anyOf character array being passed into the function are wrong. The documentation states:

If anyOf is an empty array, the method finds a match at the beginning of the string (that is, at index zero).

Whereas in reality, -1 is returned. Tested with .NET Framework 4.8 as well as .NET 8.0. Might be different in .NET 10, but then it would be a breaking change, which I haven't found anywhere.

Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.string.indexofany?view=netframework-4.7.2&devlangs=csharp&f1url=%3FappId%3DDev17IDEF1%26l%3DDE-DE%26k%3Dk(System.String.IndexOfAny)%3Bk(DevLang-csharp)%26rd%3Dtrue

Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System/String.xml

Document Version Independent Id

adc47b27-e2ac-45a7-dd56-77dcb6be0f7f

Platform Id

03aae330-04cc-2e30-ecd8-89dd5afe6fe3

Article author

@dotnet-bot