Fields

Fields, sometimes called class-level variables, are variables associated with classes or structures. An instance variable is a field associated with an instance of the class or structure, while a static variable, declared with the static keyword, is a field associated with the type itself. Fields can also be associated with their class by making them constants (const), which requires a declaration assignment of a constant value and prevents subsequent changes to the field.
Each field has a visibility of public, protected, internal, protected internal, or private (from most visible to least visible).