Complex.Multiply Method (Complex, Complex)
Note 

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Returns the product of two complex numbers.
Assembly: System.Numerics (in System.Numerics.dll)
Parameters
 left

Type:
System.Numerics.Complex
The first complex number to multiply.
 right

Type:
System.Numerics.Complex
The second complex number to multiply.
The multiplication of a complex number, a + bi, and a second complex number, c + di, takes the following form:
(ac  bd) + (ad + bc)i
If the multiplication results in an overflow in either the real or imaginary component, the value of that component is either Double.PositiveInfinity or Double.NegativeInfinity.
The Multiply method is implemented for languages that do not support custom operators. Its behavior is identical to multiplication using the multiplication operator.
The following example multiples a complex number by each element in an array of complex numbers.
Imports System.Numerics Module Example Public Sub Main() Dim number1 As New Complex(8.3, 17.5) Dim numbers() As Complex = { New Complex(1.4, 6.3), New Complex(2.7, 1.8), New Complex(3.1, 2.1) } For Each number2 In numbers Console.WriteLine("{0} x {1} = {2}", number1, number2, Complex.Multiply(number1, number2)) Next End Sub End Module ' The example displays the following output: ' (8.3, 17.5) x (1.4, 6.3) = (98.63, 76.79) ' (8.3, 17.5) x (2.7, 1.8) = (53.91, 32.31) ' (8.3, 17.5) x (3.1, 2.1) = (62.48, 36.82)
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone
Available since 8.1