Round Method (Decimal, Int32, MidpointRounding)

Math.Round Method (Decimal, Int32, MidpointRounding)


Rounds a decimal value to a specified number of fractional digits. A parameter specifies how to round the value if it is midway between two numbers.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

public static decimal Round(
	decimal d,
	int decimals,
	MidpointRounding mode


Type: System.Decimal

A decimal number to be rounded.

Type: System.Int32

The number of decimal places in the return value.

Type: System.MidpointRounding

Specification for how to round d if it is midway between two other numbers.

Return Value

Type: System.Decimal

The number nearest to d that contains a number of fractional digits equal to decimals. If d has fewer fractional digits than decimals, d is returned unchanged.

Exception Condition

decimals is less than 0 or greater than 28.


mode is not a valid value of System.MidpointRounding.


The result is outside the range of a Decimal.


For examples and comprehensive usage information about this and other overloads of the Round method, see the Round reference page.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Return to top
© 2015 Microsoft