C# Data Types

Data types define the type of data that a variable can store.  A variable in C# must be a specified data type.

 

C# supports a variety of data types, which can be broadly categorized into two main groups:

 

Value Types and Reference Types.

Here is an overview of some commonly used data types in C#.

 

1. Value Types

 

Numeric Types:

byte: 8-bit unsigned integer.

sbyte: 8-bit signed integer.

short: 16-bit signed integer.

ushort: 16-bit unsigned integer.

int: 32-bit signed integer.

uint: 32-bit unsigned integer.

long: 64-bit signed integer.

ulong: 64-bit unsigned integer.

float: 32-bit floating-point.

double: 64-bit floating-point.

decimal: 128-bit decimal.

 

Character Types:

char: 16-bit Unicode character.

 

Boolean Type:

bool: Represents true or false.

 

Structs:

User-defined value types.

 

2. Reference Types

 

Class Types:

class: Reference type that can contain data members (fields), methods, properties, and events.

 

Interface Types:

interface: Defines a contract for classes that implement it.

 

Array Types:

Array: Represents a collection of elements of the same type.

 

String Type:

string: Represents a sequence of characters.

 

Delegate Types:

delegate: Represents a reference to a method.

 

Object Type:

object: The ultimate base class for all types in C#.

 

Nullable Types:

Allow value types to have a value of null.

 

Dynamic Type:

dynamic: Represents an object whose operations will be resolved at runtime.

 

These are some of the fundamental data types in C#. Depending on the version of C# and the specific requirements of your program, there may be additional types and features available. C# also supports user-defined data types through the use of classes and structures.