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Interview Trap: The Interface Default Implementation Trap in C# #csharpprogramming

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May 29, 2026
6:02

You add a new method to an interface in C# and suddenly your implementation class does not behave the way you expected. The code compiles, the application runs, but the wrong method gets executed. This is one of the most confusing interview traps introduced with Default Interface Implementations in C#. In this video, I have explained 3 interface default implementation traps including multiple interface traps. #interfacedesign #csharpprogramming #csharpinterview #csharpdevelopers #interviewtrap #aspnetcore #dotnetinterviewtrap #dotnetinterviewquestion #dotnetinterview

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Interview Trap: The Interface Default Implementation Trap in C# #csharpprogramming | NatokHD