The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.

Dereference of a possibly null reference.

Argument of type 'PersonNameValidator' cannot be used for parameter 'validator' of type 'IValidator<PersonName?>' in 'IRuleBuilderOptions<Employer, PersonName?> IRuleBuilder<Employer, PersonName?>.SetValidator(IValidator<PersonName?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Argument of type 'AddressValidator' cannot be used for parameter 'validator' of type 'IValidator<Address?>' in 'IRuleBuilderOptions<Employer, Address?> IRuleBuilder<Employer, Address?>.SetValidator(IValidator<Address?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Dereference of a possibly null reference.

Argument of type 'PhoneValidator' cannot be used for parameter 'validator' of type 'IValidator<Phone?>' in 'IRuleBuilderOptions<Employer, Phone?> IRuleBuilder<Employer, Phone?>.SetValidator(IValidator<Phone?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Argument of type 'CompanyValidator' cannot be used for parameter 'validator' of type 'IValidator<Company?>' in 'IRuleBuilderOptions<Employer, Company?> IRuleBuilder<Employer, Company?>.SetValidator(IValidator<Company?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Argument of type 'PhoneValidator' cannot be used for parameter 'validator' of type 'IValidator<Phone?>' in 'IRuleBuilderOptions<Seeker, Phone?> IRuleBuilder<Seeker, Phone?>.SetValidator(IValidator<Phone?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Argument of type 'AddressValidator' cannot be used for parameter 'validator' of type 'IValidator<Address?>' in 'IRuleBuilderOptions<Seeker, Address?> IRuleBuilder<Seeker, Address?>.SetValidator(IValidator<Address?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.

Argument of type 'SkillValidator' cannot be used for parameter 'validator' of type 'IValidator<Skill?>' in 'IRuleBuilderOptions<Seeker, Skill?> IRuleBuilder<Seeker, Skill?>.SetValidator(IValidator<Skill?> validator, params string[] ruleSets)' due to differences in the nullability of reference types.