C#.NET — For methods to be considered overloaded, which aspects must differ? (Select the correct set.) Consider: Type of arguments; Return type of methods; Number of arguments; Names of methods; Order of arguments.

Introduction / Context:
Method overloading in C# permits multiple methods with the same name as long as their signatures are distinguishable by the compiler. Knowing what elements constitute the signature avoids ambiguity errors.

Given Data / Assumptions:

• Signature elements include parameter types, count, and order.
• Return type is not part of the signature for overload resolution.
• Name must be the same for overloading to occur.

Concept / Approach:
Two methods are valid overloads when they share the same name but differ by parameter type lists. Differences can arise from type changes, the number of parameters, or their order (when it affects the type sequence). The return type alone cannot distinguish overloads.

Step-by-Step Solution:

Verification / Alternative check:
Try compiling pairs that only differ by return type (will fail) versus pairs that differ by parameter lists (will succeed).

Why Other Options Are Wrong:

• A (2,4): Both items do not define overloading.
• B (3,5): Missing the crucial type dimension (1).
• D (3,4,5): Includes name changes, which are not overloading.

Common Pitfalls:
Assuming return type overloading is allowed; it is not in C#.

Final Answer:
1, 3, 5