Steps to reproduce
@{"test"=1}.containsKey("Test")
True
("{""test"":1}" | convertfrom-json -AsHashtable).containsKey("Test")
FalseExpected behavior
both should return true and keys should not be case sensitive
Actual behavior
keys from convertfrom-json -ashashtable are case sensitive
Environment data
> $PSVersionTable
PSVersion 6.1.0-preview.1
PSEdition Core
GitCommitId v6.1.0-preview.1
OS Microsoft Windows 10.0.17666
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
