Support DbProviderFactories.RegisterFactory

[bgrainger]

DbProviderFactories.RegisterFactory is a new API (dotnet/corefx#20903) in netcoreapp2.1.

Consider adding a convenience MySqlClientFactory.Register() method that registers the instance with DbProviderFactories.

Add documentation that shows how to use the old app.config/web.config way (see #525) on .NET Framework, and the deferred string-based registration on .NET Core.

[bgrainger]

This will be in netstandard2.1: dotnet/standard#356

[layer07]

No updates on this issue yet? I am still unable to understand why it is not agnostic between .NET and .NETCore. Everyone is having to rewrite a bunch of code.

[bgrainger]

The API is coming in netstandard2.1, which hasn't been released yet.

Can you be more specific about what you need?

[layer07]

Hi bgrainger, thanks for answering!

Well, actually what I wanted is more broad...
DbProviderFactories.RegisterFactory works just fine on .netcore, but won't work on regular .NET (lets say 4.7.2) More an issue with MS itself.

[bgrainger]

Since .NET 4.8 won't support netstandard2.1 it looks unlikely that it'll be on the full .NET Framework. (Unless they choose to just implement that one method, but I'm not sure why that would be necessary when there's already the app.config way of registering additional factories.)

[bgrainger]

Added in 0.50.0.