C# Feature - checked operators

Overview

The checked keyword and checked context make arithmetic overflow throw an exception instead of wrapping silently.

Introduced In

C# 1.0 (2002)

Before

int max = int.MaxValue;
int wrapped = max + 1;

After

int max = int.MaxValue;
int safe = checked(max + 1);

Gotchas & Best Practices

• Use checked in numeric code where overflow is a bug.
• Use unchecked explicitly when wraparound is intentional.