For each occurrence of a given identifier as a simple-name in an expression or declarator, within the local variable declaration space (§CNDJ6nn5us4RjIIAqgBLqQsCAAAACAAAAA4AAABfAFIAZQBmADQANgAxADYAMgAyADEAMwA4AAAA REF _Ref461622138 \r \h 3.3) immediately enclosing that occurrence, every other occurrence of the same identifier as a simple-name in an expression or declarator must refer to the same entity. This rule ensures that the meaning of a name is always the same within a given block, switch block, for-, foreach- or using-statement, or anonymous function.