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

D7	add.ovf.un	Adds two unsigned integer values with an overflow check.

The stack transitional behavior, in sequential order, is:

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

OverflowException is thrown if the result is not represented in the result type.

You can perform this operation on signed integers. For floating-point values, use OpCodes.Add.

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) instruction 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.ovf.un 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