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# Complex.Negate Method

Silverlight

Returns the additive inverse of a specified complex number.

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

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.

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 Demo(System.Windows.Controls.TextBlock outputBlock)
{
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)
outputBlock.Text += String.Format("{0} --> {1}", c1, Complex.Negate(c1)) + "\n";
}
}
// 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)

```

#### Silverlight

Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.