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DateTime.AddMilliseconds Method

Adds the specified number of milliseconds to the value of this instance.

[Visual Basic]
Public Function AddMilliseconds( _
   ByVal value As Double _
) As DateTime
public DateTime AddMilliseconds(
 double value
public: DateTime AddMilliseconds(
 double value
public function AddMilliseconds(
   value : double
) : DateTime;


A number of whole and fractional milliseconds. The value parameter can be negative or positive.

Return Value

A DateTime whose value is the sum of the date and time represented by this instance and the number of milliseconds represented by value.


Exception Type Condition
ArgumentOutOfRangeException The resulting DateTime is less than MinValue or greater than MaxValue.


This method does not change the value of this DateTime. Instead, a new DateTime is returned whose value is the result of this operation.

The fractional part of value is the fractional part of a millisecond. For example, 4.5 is equivalent to 4 milliseconds, and 5000 ticks (where one millisecond = 10000 ticks).

The value parameter is rounded to the nearest tick.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

See Also

DateTime Structure | DateTime Members | System Namespace | Double