Metalama.Patterns.Observability 2026.1.31

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.7.2 This package targets .NET Framework 4.7.2. The package is compatible with this framework or higher.
There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package Metalama.Patterns.Observability --version 2026.1.31
                    


                    

                
NuGet\Install-Package Metalama.Patterns.Observability -Version 2026.1.31
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Metalama.Patterns.Observability" Version="2026.1.31" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Metalama.Patterns.Observability" Version="2026.1.31" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Metalama.Patterns.Observability" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Metalama.Patterns.Observability --version 2026.1.31
                    


                    

                
#r "nuget: Metalama.Patterns.Observability, 2026.1.31"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Metalama.Patterns.Observability@2026.1.31
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Metalama.Patterns.Observability&version=2026.1.31
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Metalama.Patterns.Observability&version=2026.1.31
                    


                            Install as a Cake Tool

Metalama by PostSharp

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:

  • ObservableAttribute is a type-level aspect that implements the Observer pattern and the INotifyPropertyChanged interface.
  • NotObservableAttribute is an attribute that waives a property from the ObservableAttribute aspect.
  • ConstantAttribute is an attribute that represents that a method is safe for use from a property made observable by the ObservableAttribute aspect.
  • SuppressObservabilityWarningsAttribute is an attribute that suppresses all warnings reported by the ObservableAttribute aspect in the target property.
  • ObservabilityExtensions.ConfigureObservability is a fabric extension method that allows to configure the ObservableAttribute aspect.

Additional Documentation

  • Metalama.Patterns.Immutability implements the immutability concept used by the current package to decide which method calls are supported in property getters.

AI Coding Assistants

If you use an AI coding assistant such as Claude Code, install the Metalama AI Skills plugin. It gives the assistant access to the Metalama conceptual documentation, the API reference, and code samples.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 is compatible.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
2027.0.5-preview 38 10/30/2026
2027.0.4-preview 94 10/13/2026
2027.0.3-preview 93 9/16/2026
2027.0.2-preview 109 9/10/2026
2027.0.1-preview 111 9/7/2026
2026.1.31 105 10/29/2026
2026.1.30 1,897 10/13/2026
2026.1.29 1,115 10/2/2026
2026.1.28 1,864 9/16/2026
2026.1.27 481 9/10/2026
2026.1.26 314 9/5/2026
2026.1.25 1,022 8/21/2026
2026.1.24 566 8/13/2026
2026.1.23 133 8/10/2026
2026.1.22 401 8/5/2026
2026.1.21 2,629 7/21/2026
2026.1.20 1,400 7/15/2026
2026.1.19 3,295 6/27/2026
2026.0.25 149 6/30/2026
2025.1.18 135 6/30/2026
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