C# skills to master
Review types, classes, interfaces, generics, delegates, exceptions, strings, arrays, and LINQ fundamentals.
Use the right collection
Understand List, Dictionary, HashSet, Queue, Stack, LinkedList, and PriorityQueue, including the complexity of common operations.
- Prefer clear generic types
- Use StringBuilder when appropriate
- Avoid unnecessary LINQ overhead in hot paths
- Handle nullable values deliberately
Prepare for real questions
Practice translating requirements into methods, testing edge cases, and explaining why a selected approach is correct and efficient.