int是值类型还是引用类型？

Question

Why do I hear all the time that int is a reference type, but I see that int is a struct . And struct is a value type. Thanks.

Answer 1

Integers are Value types .

Main Features of Value Types

Variables that are based on value types directly contain values. Assigning one value type variable to another copies the contained value. This differs from the assignment of reference type variables, which copies a reference to the object but not the object itself.

All value types are derived implicitly from the System.ValueType.

Unlike with reference types, you cannot derive a new type from a value type. However, like reference types, structs can implement interfaces.

Unlike reference types, a value type cannot contain the null value. However, the nullable types feature does allow for value types to be assigned to null.

Each value type has an implicit default constructor that initializes the default value of that type. For information about default values of value types, see Default Values Table.

Answer 2

Int is certainly not a reference type in C#. It's a numerical struct, which is a value type. When talking about C#, it is incorrect to say int is a reference type.

Answer 3

An int is most definitely a value type. However, in some cases it can be boxed (see this article for an explanation) into a reference type.

Answer 4

int is a value type. Alternatively, you can use Nullable<int> if you need.

Answer 5

int是值类型，对象是引用类型，但默认类型是value