Enable [nullable reference types](https://docs.microsoft.com/en-us/dotnet/csharp/nullable-references) centrally and migrate OSOCE. - [ ] See [migration docs](https://docs.microsoft.com/en-us/dotnet/csharp/nullable-migration-strategies). - [ ] Keep https://github.com/Lombiq/.NET-Analyzers#adding-a-new-analyzer in mind. - [ ] Search projects for `<Nullable>` configs and `#nullable enable` instances, and remove them. [Jira issue](https://lombiq.atlassian.net/browse/OSOE-180)
Enable nullable reference types centrally and migrate OSOCE.
<Nullable>configs and#nullable enableinstances, and remove them.Jira issue