Description of all core, built-in Specifications in FluentSpecification.Core package.
These specifications are used most often along with others.
| And | Join Specifications as logical AND. |
| Or | Join Specifications as logical OR. |
| Not | Logical NOT Specification implementation. |
| For Property | Verifies if Specification is satisfied by candidate property value. |
| Cast | Converts Specification (candidate to verification) from one type to another. |

