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 8
.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
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