using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MyCoreApp
{
    public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void toolStripMenuItem1_Click(object sender, EventArgs e)
    {

    }

    private void openEdgeToolStripMenuItem_Click(object sender, EventArgs e)
    {
        Process.Start("start microsoft-edge:");
    }
}

Process.Start("microsoft-edge:");