Lesson 17 of 40 Core C# Intermediate ⏱ 35 min

Nullable Reference Types & Null Safety

Eliminate NullReferenceException with nullable annotations, null-conditional operators, null-coalescing, and the required keyword.

Part 1: Introduction to Nullable Reference Types & Null Safety

This lesson covers Eliminate NullReferenceException with nullable annotations, null-conditional operators, null-coalescing, and the required keyword.

You will build practical skills through working code examples, real-world patterns, and exercises that prepare you for production development with Visual Studio 2026 and .NET 10.

Part 2: Core Concepts

// Nullable Reference Types & Null Safety — Core C# 14 / .NET 10 Example
public class Example17
{
    // Implementation covered in this lesson
    public async Task<string> DemoAsync()
    {
        await Task.Delay(1);
        return "Lesson 17 complete!";
    }
}

Part 3: Key Patterns & Best Practices

Apply the patterns from this lesson consistently in your codebase. Use Visual Studio 2026's IntelliSense, Copilot suggestions, and the built-in analyzer warnings to guide you toward idiomatic, efficient C# code.

Part 4: Next Steps

Practice the concepts from this lesson by writing your own examples. Then move on to Lesson 18 to continue building your C# expertise.

Use VisualStudioTutor.com as your home base for all Visual Studio 2026 learning resources.

Nullable Reference Types & Null Safety

Part 1: Introduction to Nullable Reference Types & Null Safety

Part 2: Core Concepts

Part 3: Key Patterns & Best Practices

Part 4: Next Steps

C# in Visual Studio 2026