Nullability of reference types in type of parameter 'other' of 'bool Anchor.Equals(Anchor other)' doesn't match implicitly implemented member 'bool IEquatable<Anchor>.Equals(Anchor? other)' (possibly because of nullability attributes).

The type 'TKey' cannot be used as type parameter 'TKey' in the generic type or method 'Dictionary<TKey, TValue>'. Nullability of type argument 'TKey' doesn't match 'notnull' constraint.

The type 'TKey' cannot be used as type parameter 'TKey' in the generic type or method 'Dictionary<TKey, TValue>'. Nullability of type argument 'TKey' doesn't match 'notnull' constraint.

The type 'TKey' cannot be used as type parameter 'TKey' in the generic type or method 'Dictionary<TKey, TValue>'. Nullability of type argument 'TKey' doesn't match 'notnull' constraint.

The type 'T8' cannot be used as type parameter 'TRest' in the generic type or method 'Tuple<T1, T2, T3, T4, T5, T6, T7, TRest>'. Nullability of type argument 'T8' doesn't match 'notnull' constraint.

The type 'T8' cannot be used as type parameter 'TRest' in the generic type or method 'Tuple<T1, T2, T3, T4, T5, T6, T7, TRest>'. Nullability of type argument 'T8' doesn't match 'notnull' constraint.

The type 'T8' cannot be used as type parameter 'TRest' in the generic type or method 'Tuple<T1, T2, T3, T4, T5, T6, T7, TRest>'. Nullability of type argument 'T8' doesn't match 'notnull' constraint.

Possible null reference argument for parameter 'value' in 'bool ConcurrentDictionary<Type, IYamlFormatter>.TryAdd(Type key, IYamlFormatter value)'.

Empty switch block