Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

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

The type 'TId' cannot be used as type parameter 'TKey' in the generic type or method 'AsyncCursorSourceExtensions.ToDictionaryAsync<TDocument, TKey>(IAsyncCursorSource<TDocument>, Func<TDocument, TKey>, CancellationToken)'. Nullability of type argument 'TId' doesn't match 'notnull' constraint.

Non-nullable property 'ConnectionString' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.