Equals and GetHashCode in C#: Why Equality Is Harder Than It Looks

engineering #csharp #dotnet #equality

Equals and GetHashCode in C#: Why Equality Is Harder Than It Looks

Equality looks like a small detail until a domain object lands in a dictionary, hash set, cache, or LINQ query. This post will explain the contract between Equals and GetHashCode, show the common ways it breaks, and offer a practical checklist for writing value equality that stays reliable in real .NET systems.