Standard interview with technical questions (about C#, like "top 100 C# interview questions"), some coding (designing a dictionary), and a not-too-complicated architectural design question (designing a build system). Passed interview in May 2022.

Design a dictionary data structure. I could use any standard .NET library collections and data types. A dictionary has a collection of values. After it's done, they asked me to implement some extension methods, like "union", "intersect", "except", and "symmetric intersect".

Design a build system, like TeamCity.