Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Net.Http;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.Linq;
using McMaster.Extensions.CommandLineUtils;
using System.ComponentModel.DataAnnotations;
using System.Web;

namespace ConsoleApplication
{
    [HelpOption]
    [Command(ThrowOnUnexpectedArgument = false)]
    class Program
    {

        [Option(Description = "Open first result", LongName = "lucky", ShortName = "l")]
        public bool Lucky { get; set; } = true;

        [Option(Description = "Output option to console", LongName = "console", ShortName = "c")]
        public bool Inline { get; set; } = true;

        [Option(Description = "Number of results 1 - 25", LongName = "number", ShortName = "n")]
        [Range(1, 25)]
        public int Results { get; set; } = 5;

        [Argument(0)]
        public string Terms { get; set; }

        public string[] RemainingArguments { get; }

        public static int Main(string[] args)
            => CommandLineApplication.Execute<Program>(args);

        private void OnExecute(CommandLineApplication app)
        {
            if (String.IsNullOrEmpty(Terms))
            {
                app.ShowHelp();
            }
            else
            {
                string encodedTerms = HttpUtility.HtmlEncode(Terms);
                string locale = CultureInfo.CurrentCulture.Name;
                if (Inline | Lucky)
                {
                    string api = $"https://docs.microsoft.com/api/search?search={encodedTerms}&locale={locale}&$top={Results}";

                    var items = GetResults(api);

                    if (Lucky)
                    {
                        OpenResult(items.Result.results[0].url);
                    }

                    if (Inline)
                    {
                        Console.WriteLine("Items found: " + items.Result.count.ToString());
                        foreach (Result r in items.Result.results)
                        {
                            Console.WriteLine(r.iconType);
                            Console.WriteLine(r.title);
                            Console.WriteLine(r.url);
                            Console.WriteLine(" ");
                        }
                    }
                }
                else
                {
                    string url = $"https://docs.microsoft.com/search/index?search={encodedTerms}";
                    OpenResult(url);
                }
            }
        }

        private void OpenResult(string url)
        {
            var cmd = "open";

            if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                cmd = "xdg-open";
                Process.Start(new ProcessStartInfo(cmd, url));
            }

            if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
            {
                cmd = "open";
                Process.Start(new ProcessStartInfo(cmd, url));
            }

            if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
            {
                Process.Start(Utils.GetDefaultBrowserPath(), url);
            }
        }

        public async static Task<Docs> GetResults(string url)
        {
            var http = new HttpClient();
            var response = await http.GetStringAsync(url);

            var data = JsonConvert.DeserializeObject<Docs>(response);

            return data;
        }

    }
}