using System;
using System.Numerics;
using System.Globalization;
class Program
{
static void Main()
{
var z1 = new Complex(3.0, 4.0); // 3.0 + 4.0i
var z2 = new Complex(1.0, -2.0); // 1.0 - 2.0i
var z3 = z1 + z2;
double re = z3.Real;
double im = z3.Imaginary;
Console.Write(z3.ToString()); // wypisane zostanie: <4; 2>
}
}