Book Image

C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development - Fourth Edition

By : Mark J. Price
Book Image

C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development - Fourth Edition

By: Mark J. Price

Overview of this book

In C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development, Fourth Edition, expert teacher Mark J. Price gives you everything you need to start programming C# applications. This latest edition uses the popular Visual Studio Code editor to work across all major operating systems. It is fully updated and expanded with new chapters on Content Management Systems (CMS) and machine learning with ML.NET. The book covers all the topics you need. Part 1 teaches the fundamentals of C#, including object-oriented programming, and new C# 8.0 features such as nullable reference types, simplified switch pattern matching, and default interface methods. Part 2 covers the .NET Standard APIs, such as managing and querying data, monitoring and improving performance, working with the filesystem, async streams, serialization, and encryption. Part 3 provides examples of cross-platform applications you can build and deploy, such as web apps using ASP.NET Core or mobile apps using Xamarin.Forms. The book introduces three technologies for building Windows desktop applications including Windows Forms, Windows Presentation Foundation (WPF), and Universal Windows Platform (UWP) apps, as well as web applications, web services, and mobile apps.
Table of Contents (21 chapters)

Implementing advanced features

Since the third edition of this book, published in late 2017, Microsoft has added lots of great features to ASP.NET for building web services.

Implementing Health Check API

There are many paid services that perform site availability tests that are basic pings, some with more advanced analysis of the HTTP response.

ASP.NET Core 2.2 and later makes it easy to implement more detailed website health checks. For example, your website might be live, but is it ready? Can it retrieve data from its database?

  1. Open NorthwindService.csproj.
  2. Add a project reference to enable Entity Framework Core database health checks, as shown in the following markup:
    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="3.0.0" />
  3. In Terminal, restore packages and compile the website project, as shown in the following command:
    dotnet build
  4. Open Startup.cs.
  5. In the ConfigureServices...