EN CSharp Types

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All built-in types

Manual C# · Examples UO

Type	Destination
bool	Boolean
byte, sbyte, short, ushort	Small integers
int, uint, long, ulong	Signed and unsigned integers
nint, nuint	Integers the size of a process pointer
float, double	Floating point numbers
decimal	Decimal calculations
char	Code unit UTF-16
string	Immutable text
object	Common base type
dynamic	Linking Operations at Runtime

Value types include numbers, bool, char, structures, and enumerations. Classes, arrays, strings, interfaces, and delegates are reference types. Assigning to a structure copies its value; reference assignment can leave two variables with one object.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

// PROJECT-EXAMPLE
int count = 3;
string name = "Ore";
bool ready = true;
System.Console.WriteLine($"{name}:{count}:{ready}");

Result:

Ore:3:True

int hp = 50;
double fraction = hp / 100.0;
decimal price = 12.50m;
string text = $"HP={hp}, fraction={fraction:F2}, price={price}";
UO.Print(text);

var infers the type from the initial expression; it is not a separate dynamic type. void means there is no return value for the method. default(T) creates a default value for T.

var count = 3;
object boxed = count;
int restored = (int)boxed;
UO.Print(restored.ToString());

Official documentation: All built-in types - Microsoft Learn.