Setting up pythonnet for .net using NuGet

Iam trying to develop a simple calculator program embeddeding python in .net,I wanna reference pythonnet from NuGet to include it in my project

I installed pythonnet v2.3.0 using NuGet,I also have python 3 installed in my system

It would be nice if some one give me step by step instruction to embedd python net

form1.cs code :

using System;
...
using Python.Runtime;

namespace WindowsFormsApp3
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            PythonEngine.Initialize();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            int num1 = int.Parse(a.Text);
            int num2 = int.Parse(b.Text);
            result.Text = (num1 + num2).ToString();
            using (Py.GIL())
            {
                dynamic np = Py.Import("numpy");
            }
        }
     }
}

When I use using(Py.GIL()) line in my code it compiler shows

System.BadImageFormatException: 'Could not load file or assembly 'Python.Runtime, Version=2.3.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.'