'Type.IsSerializable' is obsolete: 'Formatter-based serialization is obsolete and should not be used.' (https://aka.ms/dotnet-warnings/SYSLIB0050)

'FieldAttributes.NotSerialized' is obsolete: 'Formatter-based serialization is obsolete and should not be used.' (https://aka.ms/dotnet-warnings/SYSLIB0050)

'Type.IsSerializable' is obsolete: 'Formatter-based serialization is obsolete and should not be used.' (https://aka.ms/dotnet-warnings/SYSLIB0050)

'FormatterServices' is obsolete: 'Formatter-based serialization is obsolete and should not be used.' (https://aka.ms/dotnet-warnings/SYSLIB0050)

'SharedContainerSystem.TryGetContainingContainer(EntityUid, out BaseContainer?, MetaDataComponent?, TransformComponent?)' is obsolete: 'Use Entity<T> variant'

'SharedContainerSystem.TryGetContainingContainer(EntityUid, out BaseContainer?, MetaDataComponent?, TransformComponent?)' is obsolete: 'Use Entity<T> variant'

'SharedContainerSystem.TryGetContainingContainer(EntityUid, out BaseContainer?, MetaDataComponent?, TransformComponent?)' is obsolete: 'Use Entity<T> variant'

'BoundUserInterface.DeferredClose' is obsolete

'EntitySystem.TryGet<T>(out T?)' is obsolete: 'Either use a dependency, resolve and cache IEntityManager manually, or use EntityManager.System<T>()'