What are the two main types of data types in C#?

Data types in C# are divided into two categories: value types and reference types. Value type: stored directly in a variable and cannot be modified, including integer, floating point, Boolean, character, enumeration and structure. Reference type: stores object references and can be modified, including classes, interfaces, arrays, delegates and strings.

Data types in C

#Data types in C# are mainly divided into value types and references Type Two major categories.

Value type

Value type is the data type stored directly in the variable. It occupies a fixed space in memory and cannot be modified. Once created, the contents of a value type variable cannot be changed.

Common value types include:

• Integer types (such as int, short, long)
• Floating point types (such as float, double)
• Boolean type (bool)
• Character type (char)
• Enumeration type (enum)
• Structure (struct)

Reference type

Reference type refers to a reference to an object stored in the managed heap. It occupies a variable amount of space in memory and can be modified. Reference type variables only store the memory address of the object, not the actual data.

Common reference types include:

• Class(class)
• Interface(interface)
• Array(array )
• Delegate
• String

The main difference between value types and reference types:

• Storage location: Value types are stored on the stack, while reference types are stored on the heap.
• Mutability: Value types are immutable, while reference types are mutable.
• Space occupation: Value types occupy fixed space, while reference types occupy variable space.
• Speed: Value types are generally faster than reference types because they are stored directly in memory.

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