PostSharp/Metalama.Patterns.Observabilityv2026.1.2-preview
✓ Verified.NET FW4.7.2.NET 8.0.NET Std2.0
Implements the Observable pattern and the INotifyPropertyChanged interface with a single [Observable] attribute thanks to Metalama. Supports both automatic and explicit properties and child objects.
Get Started
$ dotnet add package Metalama.Patterns.ObservabilityReadme
About
The Metalama.Patterns.Observability contains an aspect that implements the Observer pattern, i.e. the INotifyPropertyChanged interface.
Key Features
- Supports automatic properties, explicit properties (including field-backed properties).
- Supports child objects, i.e. properties like
string FullName => $"{this.Model.FirstName} {this.Model.LastName}". - Idiomatic. Does not require you to change your coding patterns (unlike the MVVM community toolkit).
- Safe. Reports warnings when a property dependency is not understood.
Main Types
The primary types in this package are:
ObservableAttributeis a type-level aspect that implements the Observer pattern and theINotifyPropertyChangedinterface.NotObservableAttributeis an attribute that waives a property from theObservableAttributeaspect.ConstantAttributeis an attribute that represents that a method is safed for use from a property made observable by theObservableAttributeaspect.SuppressObservabilityWarningsAttributeis an attribute that suppresses all warnings reported by theObservableAttributeaspect in the target property.ObservabilityExtensions.ConfigureObservabilityis a fabric extension method that allows to configure theObservableAttributeaspect.
Additional Documentation
Related Packages
Metalama.Patterns.Immutabilityimplements the immutability concept used by the current package to decide which method calls are supported in property getters.