C# Tutorial

1. C# Introduction

What C# is, how it relates to .NET, installing the .NET SDK, and top-level statements hello world.

2. C# Syntax and Variables

Value vs reference types, var, nullable reference types, string interpolation and control flow.

3. OOP in C#

Classes, records for immutable data, interfaces, inheritance, and properties with get/set and auto-properties.

4. Exception Handling in Depth

try/catch/finally, catching specific exception types, custom exceptions, and exception filters with when.

5. Advanced C#

LINQ queries and deferred execution, async/await with Task, generics, and delegates and events.

6. Collections and LINQ in Depth

List<T> and Dictionary<K,V> deep dive, GroupBy and Join, and deferred execution pitfalls.

7. Testing with xUnit

A complete xUnit test class, Assert.Throws, and data-driven tests with Theory and InlineData.

8. C# Interview Questions

Real C# interview questions and answers covering record vs class, value vs reference types, async/await and LINQ.