IEvangelist

Visual Studio Code: Authoring extensions

In less than five years, Visual Studio Code (VS Code) has become the most popular integrated development environment (IDE) in the world. It's built with love and in the open on GitHub, and runs on Chromium (a tip of the hat to Google). VS code is extendable and in this talk we'll cover how to author your very own extension.

You can expect to learn how to:

• Debug your extension
• Target specific languages
• Expose settings to users
• Provide statement completion
• Handle user interactions

IEvangelist

public void Write(object o)
{
    if (o ! is string)
    {
        Console.WriteLine("WTF?");
    }
    else
    {
        Console.WriteLine("OMG!");
    }

IEvangelist

👨🏿‍💻 👩🏿‍💻 👨🏾‍💻 👩🏾‍💻 👨🏽‍💻 👩🏽‍💻 👨🏼‍💻 👩🏼‍💻 👨🏻‍💻 👩🏻‍💻

IEvangelist

Structured show:

• 5 minutes ".NET check up"

  • Doc Rx
  • Let us perscribe you this doc, learn module, or blog post... or
  • Codeoligest

• 5 minutes opening, intros
• 45 hallway track with guest
• 5 minutes closing

IEvangelist

public readonly struct EnumerableRange : IEnumerable<int>
{
    readonly Range _range;

    public EnumerableRange(Range range)
    {
        if (range.Start.IsFromEnd || range.End.IsFromEnd)
        {
            throw new ArgumentException(nameof(range));
        }

IEvangelist

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using Company.WebApplication1;

await Host.CreateDefaultBuilder(args)
    .ConfigureWebHostDefaults(webBuilder => webBuilder.UseStartup<Startup>())
    .Build()
    .RunAsync();

IEvangelist

using System;
using System.Collections.Generic;

static IEnumerable<int> Fibonacci(int max)
{
    int current = 1, next = 1;
    while (current < max)
    {
        yield return current;
        next = current + (current = next);

IEvangelist

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Example.App;

using IHost host = Host.CreateDefaultBuilder(args)
    .ConfigureServices(services => services.AddHostedService<Worker>())
    .Build();

await host.RunAsync();

IEvangelist

#nullable enable

using System;
using System.Net.Http;
using System.Net.Http.Json;
using System.Text.Json;

JsonSerializerOptions _options = new()
{
    PropertyNameCaseInsensitive = true

IEvangelist

// GitHub:	👨🏽‍💻	https://github.com/ievangelist
// Twitter:	🤓	https://twitter.com/davidpine7
// SDK:         🛠️	https://github.com/IEvangelist/azure-cosmos-dotnet-repository

using System.ComponentModel.DataAnnotations;
using Microsoft.Azure.CosmosRepository;

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddCosmosRepository();