Non-nullable property 'SentOn' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Argument of type 'string?[]' cannot be used for parameter 'data' of type 'IEnumerable<string>' in 'Result<IEnumerable<string>> Result<IEnumerable<string>>.Success(IEnumerable<string> data, string? successMessage = null)' due to differences in the nullability of reference types.

Possible null reference argument for parameter 'source' in 'int Enumerable.Count<AnimalCategoryDto>(IEnumerable<AnimalCategoryDto> source)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'source' in 'int Enumerable.Count<BreedDto>(IEnumerable<BreedDto> source)'.

Converting null literal or possible null value to non-nullable 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.