This documentation is archived and is not being maintained.

# Complex.Negate Method

Visual Studio 2010

Returns the additive inverse of a specified complex number.

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

## Syntax

```public static Complex Negate(
Complex value
)
```

#### Parameters

value
Type: System.Numerics.Complex
A complex number.

#### Return Value

Type: System.Numerics.Complex
The result of the Real and Imaginary components of the value parameter multiplied by -1.

## Remarks

The additive inverse of a complex number is a complex number that produces a value of Zero when it is added to the original complex number. This method returns a complex number in which the real and imaginary components of the original complex number are multiplied by -1.

The Negate method is implemented for languages that do not support custom operators. Its behavior is identical to negation using the unary negation operator, UnaryNegation.

## Examples

The following example obtains the additive inverse of each element in an array of complex numbers.

```
using System;
using System.Numerics;

public class Example
{
public static void Main()
{
Complex[] values= { Complex.One,
new Complex(-7.1, 2.5),
new Complex(1.3, -4.2),
new Complex(-3.3, -1.8) };
foreach (Complex c1 in values)
Console.WriteLine("{0} --> {1}", c1, Complex.Negate(c1));
}
}
// The example displays the following output:
//       (1, 0) --> (-1, 0)
//       (-7.1, 2.5) --> (7.1, -2.5)
//       (1.3, -4.2) --> (-1.3, 4.2)
//       (-3.3, -1.8) --> (3.3, 1.8)

```

Supported in: 4

Supported in: 4

## Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.