Entry point

As explained in .NET MAUI in Action

An entry point is the method or platform-specific component at which an application begins execution.

An entry point is where an application begins execution. Regular C# programs usually start in a static Main method, while .NET MAUI starts through CreateMauiApp in MauiProgram.cs. section 2.3

A .NET MAUI startup flow proceeds through these components:

• CreateMauiApp builds and returns a MauiApp with the generic host builder. section 2.3
• UseMauiApp<App>() connects the host builder to the App application class. section 2.3
• The App constructor assigns a Page, commonly MainPage, to the MainPage member. section 2.3
• The platform-specific entry points for Android, iOS, and macOS initiate this regular execution flow. section 2.3

Startup flow

MauiProgram.CreateMauiApp() builds the application, UseMauiApp<App>() launches the App class, and App assigns new MainPage() to its MainPage member for display. section 2.3

Figure 2.13 In a .NET MAUI app, MauiProgram is the entry point, which launches App, which displays MainPage.

Trace the compact sequence from MauiProgram as the entry point to App and then the displayed MainPage. section 2.3

How .NET MAUI in Action covers it

How deep it goes

Distinguishes Main from CreateMauiApp and traces host construction, application creation, and initial page assignment.

Examples

Uses MauiProgram.cs, App.xaml.cs, CreateMauiApp, UseMauiApp<App>(), and new MainPage() as concrete artifacts.

What you can do after

Build it from scratch by configuring MauiProgram and assigning an initial Page through the App class.

How it connects

Connects CreateMauiApp with MauiApp, generic host builder, App, MainPage, Page, and platform-specific entry points.

liveBookmanning.com

Read .NET MAUI in Action on liveBook Get the book at manning.com

Also explained in

• 

  liveBookmanning.com
  The Art of Unit Testing 3eAn externally triggerable function or interface through which execution of a unit of work begins.
• 

  liveBookmanning.com
  Learn Go with Pocket-Sized ProjectsThe main function is the parameterless Go entry-point function executed when a program runs.
• 

  liveBookmanning.com
  Modern CAn entry point is a program location at which execution of a function or other callable unit begins.
• 

  liveBookmanning.com
  Go in Action, Second EditionThe main function is the specially named Go function that serves as the starting point of an executable program.
• 

  liveBookmanning.com
  Clojure: The Essential ReferenceA main method is a Java entry-point method that Java launchers invoke to start an application.
• 

  liveBookmanning.com
  The Quick Python Book, Fourth EditionA main function, or controlling function, is a conventionally designated function that coordinates a program's execution and serves as its controlling entry point.
• 

  liveBookmanning.com
  Pro Angular 16An entry point is the initial source module from which a build tool discovers an application's dependency graph.
• 

  liveBookmanning.com
  Learn Rust in a Month of LunchesThe main function is the entry-point function that Rust starts when running an executable program.
• 

  liveBookmanning.com
  Get Programming with JavaScript Next: New features of ECMAScript 2015, 2016, and beyondThe initial file or module from which dependency analysis and loading begins in a module graph.

Compare how 10 books explain entry point →

Related concepts

• database transactionpart of · A database transaction is a logical unit of database operations whose changes are committed together or rolled back as a whole.
• functionkind of · A function is a callable program unit that performs an operation, may accept inputs, and can produce a result or side effect.
• moduleuses · A module is a distinct, bounded software unit that groups related code or functionality and provides an organizational or interaction boundary within a larger system.
• exitequivalent to · exit is a standard-library function that terminates normal program execution after performing required termination processing, without ordinarily unwinding active automatic objects.
• printfuses · printf is a formatted-output API that uses a format specification and supplied values to produce text, either returning it or writing it to an output destination.

This explainer was generated by Manning's knowledge graph from the text of .NET MAUI in Action. The section links point to the parts of the book it draws on.