JsonSerializerOptions.DictionaryKeyPolicy ignores JsonNamingPolicy.CamelCase

[dodyg]

Describe the bug

JsonSerializer.ToString() ignores does not convert PascalCase dictionary keys into camelCase although JsonSerializerOptions.DictionaryKeyPolicy is set to JsonNamingPolicy.CamelCase

To Reproduce

ASP.NET Core 3 Preview 6

Expected behavior

Dictionary Keys converted to camelCase on serialization

[campersau]

Looks like you are hitting this bug: https://github.com/dotnet/corefx/issues/38840

[pranavkm]

As @campersau pointed out, this is dup of the CoreFx bug.