String builder mutability C#

February 4, 2024

String builder mutability

StringBuilder mutable = new StringBuilder("hello");

// ⚠️reference access
StringBuilder appended = mutable.Append(" world");

// ⚠️True
mutable.GetHashCode().Equals(appended.GetHashCode());


string immutable = "hello";

// ⚠️new String class
var appendedGreeting = immutable + " world";

// ⚠️False
immutable.GetHashCode().Equals(appendedGreeting.GetHashCode());