The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:

58	add	Adds two numeric values, returning a new numeric value.

The stack transitional behavior, in sequential order, is:

[The 'ordered' type of list has not been implemented in the ECMA stylesheet.]

Overflow is not detected for integer operations (for proper overflow handling, see OpCodes.Add_Ovf).

Integer addition wraps, rather than saturates. For example, assuming 8-bit integers where value1 is set to 255 and value2 is set to 1, the wrapped result is 0 rather than 256.

Floating-point overflow returns +inf (PositiveInfinity) or -inf (NegativeInfinity).

The acceptable operand types and their corresponding result data type are listed in the table below. If there is no entry for a particular type combination (for example, int32 and float; int32 and int64), it is an invalid Microsoft Intermediate Language (MSIL) and generates an error.

add	int32	int32	int32
add	int32	native int	native int
add	int32	&	&
add	int32	*	*
add	int64	int64	int64
add	native int	int32	native int
add	native int	native int	native int
add	native int	&	&
add	native int	*	*
add	F	F	F
add	&	int32	&
add	&	native int	&
add	*	int32	*
add	*	native int	*

The following ILGenerator.Emit(OpCode) method overload can use the add opcode:

• ILGenerator.Emit(OpCode)

Namespace: System.Reflection.Emit
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0