.NET MAUI API Reference

Namespace: Microsoft.Maui

Class: Application

Represents a .NET MAUI application.

The Application class is the entry point for a .NET MAUI application. It provides access to application-level resources, lifecycle events, and the main window.

Constructors

• Application()

  Initializes a new instance of the Application class.

Properties

• bool Application.IsLaunched

  Gets a value indicating whether the application has been launched.

• IReadOnlyList<IWindow> Application.Windows

  Gets the collection of windows associated with this application.

Methods

• void Application.OnAppearing()

  Called when the application appears. Override this method to add your application's initialization code.

• void Application.OnBackgrounding()

  Called when the application is backgrounded.

• void Application.OnLaunching(IWindow window)

  Called when the application is launched. Override this method to provide the initial UI.

• void Application.OnResuming()

  Called when the application is resumed from the background.

• void Application.OnStateChanged(ApplicationState newState)

  Called when the application's state changes.

• void Application.OnStopping()

  Called when the application is stopping.

Namespace: Microsoft.Maui

Interface: IWindow

Represents a window in a .NET MAUI application.

The IWindow interface defines the contract for a window, which is a top-level container for the application's UI.

Properties

• Page IWindow.Page

  Gets or sets the root page of the window.

• string IWindow.Title

  Gets or sets the title of the window.

Namespace: Microsoft.Maui.Controls

Class: View

Represents a UI element that can be displayed on the screen.

View is the base class for all visual elements in .NET MAUI. It provides properties and methods for layout, input handling, and visual appearance.

Properties

• double View.HeightRequest

  Gets or sets the desired height of the view.

• double View.WidthRequest

  Gets or sets the desired width of the view.

• Thickness View.Margin

  Gets or sets the margin of the view.

Methods

• void View.InvalidateMeasure()

  Invalidates the layout of the view, forcing a re-measurement and re-layout.

Namespace: Microsoft.Maui.Controls

Class: Button

Represents a button control that can be tapped.

Button is a fundamental UI element for user interaction, allowing users to trigger actions by tapping it.

Properties

• Color Button.BackgroundColor

  Gets or sets the background color of the button.

• string Button.Text

  Gets or sets the text displayed on the button.

Events

• event EventHandler<TappedEventArgs> Button.Clicked

  Fired when the button is clicked.

Namespace: Microsoft.Maui.Controls

Class: Label

Represents a control that displays a block of text.

Label is used to display static or dynamic text content within your application.

Properties

• string Label.Text

  Gets or sets the text content of the label.

• Color Label.TextColor

  Gets or sets the color of the text.

• TextDecorations Label.TextDecorations

  Gets or sets the text decorations.

Namespace: Microsoft.Maui.Graphics

Struct: Color

Represents an RGBA color.

The Color struct is used to define colors with Red, Green, Blue, and Alpha components.

Properties

• float Color.R

  Gets the red component of the color.

• float Color.G

  Gets the green component of the color.

• float Color.B

  Gets the blue component of the color.

• float Color.A

  Gets the alpha (opacity) component of the color.

Static Properties

• Color Color.AliceBlue

  Represents the color AliceBlue.

• Color Color.Black

  Represents the color Black.

• Color Color.White

  Represents the color White.

• Color Color.Red

  Represents the color Red.

• Color Color.Blue

  Represents the color Blue.

• Color Color.Green

  Represents the color Green.

Methods

• Color Color.FromArgb(int argb)

  Creates a Color from an ARGB integer.

• Color Color.FromHex(string hex)

  Creates a Color from a hexadecimal string (e.g., "#RRGGBB" or "#AARRGGBB").