7. Expressions
An expression is a sequence of operators and operands. This chapter defines the syntax, order of evaluation of operands and operators, and meaning of expressions.
7.1 Expression Classifications
An expression is classified as one of the following:
• A value. Every value has an associated type.
• A variable. Every variable has an associated type—namely, the declared type of the variable.
• A namespace. An expression with this classification can appear only as the left-hand side member-access (§7.5.4) or as an operand for the as operator (§7.9.11), the is operator (§7.9.10), or the typeof operator (§7.5.11). In any other context, an expression classified as a type causes a compile-time error.
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