davidfowl

using System.Text.Json;
using System.Text.Json.Serialization;

var data = new[]
{
    "Hello"u8.ToArray(),
    "Twitter"u8.ToArray(),
    "Optimize"u8.ToArray()
}
.Select(m => new Message(m)).ToArray();

davidfowl

using System.Diagnostics;
using System.Net.Sockets;
using System.Security.Authentication;
using Yarp.Telemetry.Consumption;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddTelemetryConsumer<TelemetryConsumer>();

var app = builder.Build();

davidfowl

public static class ConfigurationBinderExtensions
{
    public static ValidateOptionsResult BindAndValidate<TOptions>(this IConfiguration configuration, TOptions instance) where TOptions : class, new()
    {
        configuration.Bind(instance);
        var validateOptions = new DataAnnotationValidateOptions<TOptions>(Options.DefaultName);
        return validateOptions.Validate(Options.DefaultName, instance);
    }
}

davidfowl

using System.Data.Common;
using System.Runtime.CompilerServices;
using System.Text;
using Npgsql;

GetCatalogItemsSql(null, null, null, 10);

void GetCatalogItemsSql(int? catalogBrandId, int? before, int? after, int pageSize)
{
    // This looks like it would be susceptible to SQL injection, but it's not.

davidfowl

using System.Collections.Concurrent;
using System.Threading.Channels;

var channel = Channel.CreateUnbounded<int>();

var syncContext = new SingleThreadedSyncContext();

syncContext.Post(async _ =>
{
    await foreach (var item in channel.Reader.ReadAllAsync())

davidfowl

using Microsoft.Extensions.Configuration.Memory;

var builder = WebApplication.CreateBuilder(args);

builder.Configuration.AddConfigurationDefaults(new()
{
    { "request:timeout", "60" }
});

var app = builder.Build();

davidfowl

using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.WebUtilities;
using ProtoBuf;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/", () => "POST a protobuf message to the /");
app.MapPost("/", (Proto<Person> p) => Results.Extensions.Protobuf(p.Item))
    .Accepts<Person>("application/protobuf");

davidfowl

using System.IO.Pipelines;
using System.Net;
using System.Net.Security;
using Microsoft.AspNetCore.Connections;
using Microsoft.AspNetCore.Connections.Features;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.Server.Kestrel.Core;

var builder = WebApplication.CreateBuilder(args);

davidfowl

using System.ComponentModel.DataAnnotations;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapPost("/todos", async (CreateTodo createTodo, TodoDb db) =>
{
    // This is where the implicit conversion comes in
    db.Todos.Add(createTodo);

davidfowl

Migration to ASP.NET Core in .NET 6

• WebApplication and WebApplicationBuilder
• Differences in the hosting model
• Building libraries for ASP.NET Core
• FAQ
• Cheatsheet

WebApplication and WebApplicationBuilder