Ściąga programisty: c# Built-In Data Types

Value type variables can be assigned a value directly. They are derived from the class System.ValueType.

Short Name	.NET Class	Type	Width	Range (bits)
byte	Byte	Unsigned integer	8	0 to 255
sbyte	SByte	Signed integer	8	-128 to 127
int	Int32	Signed integer	32	-2,147,483,648 to 2,147,483,647
uint	UInt32	Unsigned integer	32	0 to 4294967295
short	Int16	Signed integer	16	-32,768 to 32,767
ushort	UInt16	Unsigned integer	16	0 to 65535
long	Int64	Signed integer	64	-9223372036854775808 to 9223372036854775807
ulong	UInt64	Unsigned integer	64	0 to 18446744073709551615
float	Single	Single-precision floating point type	32	-3.402823e38 to 3.402823e38
double	Double	Double-precision floating point type	64	-1.79769313486232e308 to 1.79769313486232e308
char	Char	A single Unicode character	16	Unicode symbols used in text
bool	Boolean	Logical Boolean type	8	True or false
object	Object	Base type of all other types
string	String	A sequence of characters
decimal	Decimal	Precise fractional or integral type that can represent decimal numbers with 29 significant digits	128	±1.0 × 10e−28 to ±7.9 × 10e28

IMPLICIT CONVERSIONS

The following is a list of implicit conversions between .NET Framework data types:

int int1 = 5;
long long1 = int1;  //implicit conversion

Source Type	Target Type
Byte	short, ushort, int, uint, long, ulong, float, double, or decimal
Sbyte	short, int, long, float, double, or decimal
Int	long, float, double, or decimal
Uint	long, ulong, float, double, or decimal
Short	int, long, float, double, or decimal
Ushort	int, uint, long, ulong, float, double, or decimal
Long	float, double, or decimal
Ulong	float, double, or decimal
Float	double
Char	ushort, int, uint, long, ulong, float, double, or decimal

EXPLICIT CONVERSIONS

The following table lists explicit conversions:

long long2 = 5483;
int int2 = (int)long2;  //explicit conversion

Source Type	Target Type
Byte	sbyte or char
Sbyte	byte, ushort, uint, ulong, or char
Int	sbyte, byte, short, ushort, uint, ulong, or char
Uint	sbyte, byte, short, ushort, int, or char
Short	sbyte, byte, ushort, uint, ulong, or char
Ushort	sbyte, byte, short, or char
Long	sbyte, byte, short, ushort, int, uint, ulong, or char
Ulong	sbyte, byte, short, ushort, int, uint, long, or char
Float	sbyte, byte, short, ushort, int, uint, long, ulong, char, ordecimal
Double	sbyte, byte, short, ushort, int, uint, long, ulong, char, float, or decimal
Char	sbyte, byte, or short
Decimal	sbyte, byte, short, ushort, int, uint, long, ulong, char, float, or double

C# Type Conversion Methods

Sr.No	Methods & Description
1	ToBoolean Converts a type to a Boolean value, where possible.
2	ToByte Converts a type to a byte.
3	ToChar Converts a type to a single Unicode character, where possible.
4	ToDateTime Converts a type (integer or string type) to date-time structures.
5	ToDecimal Converts a floating point or integer type to a decimal type.
6	ToDouble Converts a type to a double type.
7	ToInt16 Converts a type to a 16-bit integer.
8	ToInt32 Converts a type to a 32-bit integer.
9	ToInt64 Converts a type to a 64-bit integer.
10	ToSbyte Converts a type to a signed byte type.
11	ToSingle Converts a type to a small floating point number.
12	ToString Converts a type to a string.
13	ToType Converts a type to a specified type.
14	ToUInt16 Converts a type to an unsigned int type.
15	ToUInt32 Converts a type to an unsigned long type.
16	ToUInt64 Converts a type to an unsigned big integer.