Get REAL and IMAG from a complex number in the analyzed equation

Question

I evaluate Math.NET Symbolics for use in our application, where we want a simple math analyzer to allow the user to compute user equations from our measurement data. Our data is presented as Complex .

For testing, I use the following code snippet in LINQPad:

var complexA = new Complex(1, 1);
var complexB = new Complex(1, 2);
var symbols = new Dictionary<string, FloatingPoint>()
    {
        { "a", complexA },
        { "b", complexB }
    };

Evaluate.Evaluate(symbols, Infix.ParseOrUndefined("1/(a*b)+cos(b)")).ComplexValue.Dump();

This works fine, but I could not find the following operators:
How can we get the REAL or IMAGINARY part of the characters?

I tried real(b)and imag(b)but it did not work.

As a workaround, I could also do the following, but I would prefer that the operator kind of abs(b)get me a value:

var complexA = new Complex(1, 1);
var complexB = new Complex(1, 2);
var symbols = new Dictionary<string, FloatingPoint>()
    {
        { "a", complexA },
        { "b", complexB },
        { "b_REAL", complexB.Real },
        { "b_IMAG", complexB.Imaginary }
    };

Evaluate.Evaluate(symbols, Infix.ParseOrUndefined("1/(a*b)+b_REAL")).ComplexValue.Dump();

P.S.: , , .