These are the customer-reported issues addressed in 15.7.1:

• This release includes a fix that reduces memory usage and GC pressure during solution load.

Microsoft Security Advisory for .NET Core Denial Of Service Vulnerability

CVE-2018-0765

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core and .NET native version 2.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Microsoft is aware of a denial of service vulnerability that exists when .NET Framework and .NET Core improperly process XML documents. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Framework, .NET Core, or .NET native application.

The update addresses the vulnerability by correcting how .NET Framework, .NET Core, and .NET native applications handle XML document processing.

If your application is an ASP.NET Core application, developers are also advised to update to ASP.NET Core 2.0.8. 

Asp.Net Core WebSockets Vs SignalR. Which should you use? (Full Course)

In this video we build 2 separate chat applications, one using Asp.Net Core WebSockets and the other using SignalR, allowing you to compare approaches and decide on which one works best for you. In both cases we build them with C#, .NET Core and JavaScript. You’ll also learn about:

- .NET Core Request Pipeline
- Request Delegates
- Asynchronous Programming in .NET (Async / Await)
- Introduction to Dependency Injection  

ASP.NET Core 2.1 introduces new application host for Windows services. We can now run ASP.NET Core applications as Windows services with minimal effort. This blog post introduces how it is done and how to build and run Windows services on ASP.NET Core without any need for dirty hacks. 

{
    "dependencies": {
        "MailKit": "1.10.0"
    }
}

using System.Threading.Tasks;
using ASPNETCoreIdentitySample.Services.Contracts.Identity;
using MailKit.Net.Smtp;
using MailKit.Security;
using MimeKit;
 
namespace ASPNETCoreIdentitySample.Services.Identity
{
    public class AuthMessageSender : IEmailSender, ISmsSender
    {
        public async Task SendEmailAsync(string email, string subject, string message)
        {
            var emailMessage = new MimeMessage();
 
            emailMessage.From.Add(new MailboxAddress("DNT", "do-not-reply@dotnettips.info"));
            emailMessage.To.Add(new MailboxAddress("", email));
            emailMessage.Subject = subject;
            emailMessage.Body = new TextPart(TextFormat.Html)
            {
                Text = message
            };
 
            using (var client = new SmtpClient())
            {
                client.LocalDomain = "dotnettips.info";
                await client.ConnectAsync("smtp.relay.uri", 25, SecureSocketOptions.None).ConfigureAwait(false);
                await client.SendAsync(emailMessage).ConfigureAwait(false);
                await client.DisconnectAsync(true).ConfigureAwait(false);
            }
        }
 
        public Task SendSmsAsync(string number, string message)
        {
            // Plug in your SMS service here to send a text message.
            return Task.FromResult(0);
        }
    }
}

using (var stream = new FileStream($@"c:\smtppickup\email-{Guid.NewGuid().ToString("N")}.eml", FileMode.CreateNew))
{
   emailMessage.WriteTo(stream);
}

Steve Smith shows us a starting point for building ASP.NET Core apps in Visual Studio using a clean architecture.