Не работает код для решение системы уравнений

using System;
using MathNet.Numerics;
using MathNet.Numerics.Optimization;
using MathNet.Numerics.LinearAlgebra.Double;
 
class Program
{
    static void Main()
    {
        Func<Vector<double>, double> objectiveFunction = v =>
        {
            return Math.Pow(10 * Math.Cos(120 * Math.PI / 180) + 20 * Math.Cos(v[0]) + 30 * Math.Cos(v[1]) - 50, 2) +
            Math.Pow(10 * Math.Sin(120 * Math.PI / 180) + 20 * Math.Sin(v[0]) + 30 * Math.Sin(v[1]) - 100, 2);
        };
 
        Vector<double> initialGuess = DenseVector.OfArray(new double[] { 0, 0 });
 
 
        var result = NelderMeadSimplex.Minimum(objectiveFunction, initialGuess);
 
 
        Console.WriteLine("phi2 = " + result.MinimizingPoint[0]);
        Console.WriteLine("phi3 = " + result.MinimizingPoint[1]);
    }
}

Func<MathNet.Numerics.LinearAlgebra.Vector<double>, double> func = v =>
        {
            return Math.Pow(10 * Math.Cos(120 * Math.PI / 180) + 20 * Math.Cos(v[0]) + 30 * Math.Cos(v[1]) - 50, 2) +
            Math.Pow(10 * Math.Sin(120 * Math.PI / 180) + 20 * Math.Sin(v[0]) + 30 * Math.Sin(v[1]) - 100, 2);
        };
 
MathNet.Numerics.LinearAlgebra.Vector<double> initialGuess = DenseVector.OfArray(new double[] { 0, 0 });
 
var objectiveFunction = ObjectiveFunction.Value(func);
var result = NelderMeadSimplex.Minimum(objectiveFunction, initialGuess);
 
Console.WriteLine("phi2 = " + result.MinimizingPoint[0]);
Console.WriteLine("phi3 = " + result.MinimizingPoint[1]);