What are the characteristics of a struct in C#?

Characteristics of struct in C# include:

1. Value type: struct is a type of value that is stored on the stack instead of the heap. Compared to reference types, it has faster storage and access speeds, but its size is fixed.
2. No support for inheritance: Unlike classes, structs do not support inheritance. Structs are simple data structures that encapsulate a set of related variables and cannot contain methods or properties.
3. Default constructor: a struct can have a constructor, but it does not support a parameterless default constructor. Initial values must be explicitly provided for all member variables.
4. Value copy: When assigning one struct to another struct, a value copy is made, meaning that each member variable is copied instead of sharing the same reference.
5. You can use the default comparison operators: C# provides default comparison operators for structs (such as ==, !=, <, >), which can be used for comparison.
6. Structs can implement interfaces in order to support polymorphism. However, since structs cannot inherit, interfaces are their only means of implementation.
7. Suitable for small data structures: Because struct is a value type with a fixed size, it is suitable for storing small data structures such as coordinates and colors. For large and complex data structures, it is recommended to use class.