[Closed] Possible new converter to check for null

[IeuanWalker]

Before this change #289 I was using the converter to check if double? was null, but due to that change, the converter now throws an InvalidCastException if it's not a string.

So I propose we create some new converters to cover the old behaviour IsNullConverter & IsNotNullConverter

[brminnick]

Thanks @IeuanWalker!

This was one of the scenarios that we were concerned about breaking when re-implementing IsStringNullOrEmptyConverter.

I think IsNullConverter and IsNotNullConverter are good names for the new converters 👍

If you're able to open a New Feature Proposal for this I'd be happy to Champion it and bring it up for a vote/approval in our next standup 💯:

https://github.com/CommunityToolkit/Maui/issues/new?assignees=&labels=new%2C+proposal&template=open-a-new-feature-proposal.md&title=%5BProposal%5D+

[IeuanWalker]

Thanks @brminnick, done #306

[CliffAgius]

Closed as completed #306