C#.NET — Which of the following is correct about the Bitwise OR operator (|)?

Introduction / Context:
This question covers the bitwise OR operator in C#. It is often used in low-level programming to manipulate individual bits.

Given Data / Assumptions:

• Operator: | (bitwise OR).
• Operation compares each bit position of two integers.

Concept / Approach:
In bitwise OR, any bit position where at least one operand has 1 results in 1. This is often used to set (turn ON) bits in a bitmask.

Step-by-Step Solution:

Verification / Alternative check:
Apply OR with a mask: value | 0x04 sets bit 2 regardless of its previous state.

Why Other Options Are Wrong:
| does not turn OFF, invert, or directly test bits. It only sets ON bits when combined with 1.

Common Pitfalls:
Confusing | with & (AND) or ^ (XOR).

Final Answer:
The | operator can be used to put ON a bit.