In what cases is it preferable to use structured data types instead of classes?

Structured data types (struct) in C# are preferred when:

• Lightweight objects are needed that are created and destroyed frequently.
• Objects have a small size and do not require inheritance.
• To avoid overhead associated with memory management related to classes (which are reference types).

Struct is a value type stored on the stack, which can improve performance when working with small data.

Example of using struct:

public struct Point
{
    public int X;
    public int Y;

    public Point(int x, int y)
    {
        X = x;
        Y = y;
    }
}

If inheritance, polymorphism, or a long-lived object is required, it is better to use classes.