All 17 Interfaces & Abstract Classes questions
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What is an interface, and what can (and can't) it contain in its most basic form? What is an abstract class, and how does it differ from a fully concrete base class? What is the difference between an interface and an abstract class in C#, and when should you choose one over the other? What are default interface methods and when are they useful? How do you decide between using an interface versus an abstract class for a given design? How do default interface methods (C# 8+) let an interface provide implementation, and what backward-compatibility problem do they solve? How does explicit interface implementation work, and when would you use it instead of a normal (implicit) implementation? When would you choose an abstract class over an interface for extensibility? What is the Interface Segregation Principle and how does it apply in C#? How do static abstract interface members (C# 11+) enable generic math and other 'static polymorphism' patterns?
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C# › Interfaces & Abstract Classes

Can a class implement two interfaces with the same method? How is it resolved?

Intermediate

Answer

Yes. If signatures clash you can implement the members explicitly, qualified by interface name, so each interface gets its own behaviour accessible via that interface type.
class C : IA, IB { void IA.Do(){} void IB.Do(){} }
Real-world example Explicit implementation hides a rarely-used interface method from the public surface.
All 17 Interfaces & Abstract Classes questions