In C# terminology, how many values can a subroutine (a void method) effectively return?

Introduction / Context:
In some literature, a “subroutine” refers to a method that does not return a value via the return keyword (void). However, C# supports multiple output mechanisms beyond the single return value.

Given Data / Assumptions:

• A subroutine does not return a value with return.
• C# allows ref and out parameters to pass data back to the caller.
• params affects argument count, not return values.

Concept / Approach:
While a void method cannot return a value directly, it can modify variables passed by reference using ref or out. Therefore, the number of effective values a subroutine can “return” depends on how many such by-reference parameters it has.

Step-by-Step Solution:

Verification / Alternative check:
Inspect method signatures with multiple ref/out parameters and observe caller-side changes after invocation.

Why Other Options Are Wrong:

• params: Only changes how many inputs can be passed; does not affect outputs.
• Any number of values: Too broad without mechanism.
• 0 or 1: Too restrictive given ref/out.

Common Pitfalls:
Equating “no return value” with “no way to pass results back.”

Final Answer:
Depends upon how many ref arguments it uses.