Complex.NaN Field 
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Represents a complex instance that is not a number (NaN).
public: static initonly System::Numerics::Complex NaN;public static readonly System.Numerics.Complex NaN; staticval mutable NaN : System.Numerics.ComplexPublic Shared ReadOnly NaN As Complex