System.ObjectModel 4.3.0-preview1-24530-04

Provides types and interfaces that allow the creation of observable types that provide notifications to clients when changes are made to it. Commonly Used Types: System.ComponentModel.INotifyPropertyChanged System.Collections.ObjectModel.ObservableCollection<T> System.ComponentModel.PropertyChangedEventHandler System.Windows.Input.ICommand System.Collections.Specialized.INotifyCollectionChanged System.Collections.Specialized.NotifyCollectionChangedEventArgs System.Collections.Specialized.NotifyCollectionChangedEventHandler System.Collections.ObjectModel.KeyedCollection<TKey, TItem> System.ComponentModel.PropertyChangedEventArgs System.Collections.ObjectModel.ReadOnlyDictionary<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.

Showing the top 20 packages that depend on System.ObjectModel.

Packages Downloads
NETStandard.Library
A set of standard .NET APIs that are prescribed to be used and supported together. 18a36291e48808fa7ef2d00a764ceb1ec95645a5 When using NuGet 3.x this package requires at least version 3.4.
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NETStandard.Library
A set of standard .NET APIs that are prescribed to be used and supported together. This includes all of the APIs in the NETStandard.Platform package plus additional libraries that are core to .NET but built on top of NETStandard.Platform. When using NuGet 3.x this package requires at least version 3.4.
 337
System.Dynamic.Runtime
Provides classes and interfaces that support the Dynamic Language Runtime (DLR). Commonly Used Types: System.Runtime.CompilerServices.CallSite System.Runtime.CompilerServices.CallSite<T> System.Dynamic.IDynamicMetaObjectProvider System.Dynamic.DynamicMetaObject System.Dynamic.SetMemberBinder System.Dynamic.GetMemberBinder System.Dynamic.ExpandoObject System.Dynamic.DynamicObject System.Runtime.CompilerServices.CallSiteBinder System.Runtime.CompilerServices.ConditionalWeakTable<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.
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Microsoft.CSharp
Provides support for compilation and code generation, including dynamic, using the C# language. Commonly Used Types: Microsoft.CSharp.RuntimeBinder.Binder Microsoft.CSharp.RuntimeBinder.RuntimeBinderException Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfoFlags Microsoft.CSharp.RuntimeBinder.CSharpBinderFlags When using NuGet 3.x this package requires at least version 3.4.
 96
Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
 81
System.Dynamic.Runtime
Provides classes and interfaces that support the Dynamic Language Runtime (DLR). Commonly Used Types: System.Runtime.CompilerServices.CallSite System.Runtime.CompilerServices.CallSite<T> System.Dynamic.IDynamicMetaObjectProvider System.Dynamic.DynamicMetaObject System.Dynamic.SetMemberBinder System.Dynamic.GetMemberBinder System.Dynamic.ExpandoObject System.Dynamic.DynamicObject System.Runtime.CompilerServices.CallSiteBinder System.Runtime.CompilerServices.ConditionalWeakTable<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.
 76
System.Linq.Expressions
Provides classes, interfaces and enumerations that enable language-level code expressions to be represented as objects in the form of expression trees. Commonly Used Types: System.Linq.Expressions.Expression<TDelegate> System.Linq.Expressions.Expression System.Linq.Expressions.MemberExpression System.Linq.Expressions.ExpressionVisitor System.Linq.Expressions.MethodCallExpression System.Linq.IQueryable<T> System.Linq.IQueryable System.Linq.Expressions.NewExpression System.Linq.Expressions.ParameterExpression System.Linq.Expressions.ConstantExpression When using NuGet 3.x this package requires at least version 3.4.
 72
Microsoft.CSharp
Provides support for compilation and code generation, including dynamic, using the C# language. Commonly Used Types: Microsoft.CSharp.RuntimeBinder.Binder Microsoft.CSharp.RuntimeBinder.RuntimeBinderException Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfoFlags Microsoft.CSharp.RuntimeBinder.CSharpBinderFlags When using NuGet 3.x this package requires at least version 3.4.
 67
Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
 67
NuGet.Packaging
NuGet's implementation for reading nupkg package and nuspec package specification files.
 62
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 57
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 56
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 55
System.Linq.Dynamic.Core
This is a .NET Core port of the the Microsoft assembly for the .Net 4.0 Dynamic language functionality.
 53
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 53
NuGet.Packaging
NuGet's implementation for reading nupkg package and nuspec package specification files.
 52
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 52
FluentAssertions
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit test. Runs on 4.0 and 4.5 (Desktop and Windows Store), CoreCLR, Silverlight 5 and Windows Phone 8, 8.1 and 8.1 for Silverlight. Supports the unit test frameworks NUnit, XUnit, XUnit2, MBUnit, Gallio, MSpec, and NSpec.
 51
Microsoft.CSharp
Provides support for compilation and code generation, including dynamic, using the C# language. Commonly Used Types: Microsoft.CSharp.RuntimeBinder.Binder Microsoft.CSharp.RuntimeBinder.RuntimeBinderException Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfoFlags Microsoft.CSharp.RuntimeBinder.CSharpBinderFlags When using NuGet 3.x this package requires at least version 3.4.
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MonoAndroid 1.0

  • No dependencies.

MonoTouch 1.0

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.NET Framework 4.5

  • No dependencies.

.NETCore 5.0

.NET Standard 1.0

.NET Standard 1.3

.NETPortable 0.0

  • No dependencies.

Windows 8.0

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WindowsPhone 8.0

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WindowsPhoneApp 8.1

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Xamarin.iOS 1.0

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Xamarin.Mac 2.0

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Xamarin.TVOS 1.0

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Xamarin.WatchOS 1.0

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Version Downloads Last updated
4.3.0 19 09/28/2026
4.3.0-preview1-24530-04 35 12/13/2025
4.0.12 73 12/13/2025
4.0.12-rc2-24027 42 12/13/2025
4.0.11-beta-23516 38 12/13/2025
4.0.11-beta-23409 3 10/08/2026
4.0.11-beta-23225 36 12/14/2025
4.0.10 33 12/14/2025
4.0.10-beta-23109 39 12/13/2025
4.0.10-beta-23019 40 12/14/2025
4.0.10-beta-22816 43 12/13/2025
4.0.10-beta-22605 39 12/13/2025
4.0.10-beta-22416 42 12/13/2025
4.0.10-beta-22231 37 12/13/2025
4.0.0 34 12/13/2025
4.0.0-beta-23109 41 12/13/2025
4.0.0-beta-23019 41 12/14/2025