What are the differences between classes and structs, and when should each be used?

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Classes are reference types, while structs are value types. Classes are used for complex data structures, inheritance, and reference counting. Structs are used for simple data types and performance optimization.

Classes are reference types, stored on the heap, and support inheritance and reference counting. Use classes for complex data structures like objects, where identity matters.
Structs are value types, stored on the stack, and do not support inheritance. Use structs for simple data types like coordinates, where copying is preferred over reference.
Classes are passed by reference, while structs are passed by value. Classes are mutable, while structs are immutable by default.
Example: Class - Person with properties like name and age. Struct - Point with properties x and y coordinates.

What are the differences between classes and structs, and when should each be used?

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