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ReadOnlyObservableCollection(T) Constructor

Initializes a new instance of the ReadOnlyObservableCollection(T) class that serves as a wrapper around the specified ObservableCollection(T).

Namespace:  System.Collections.ObjectModel
Assembly:  System (in System.dll)

new : 
        list:ObservableCollection<'T> -> ReadOnlyObservableCollection


Type: System.Collections.ObjectModel.ObservableCollection(T)

The ObservableCollection(T) with which to create this instance of the ReadOnlyObservableCollection(T) class.


list is a null reference (Nothing in Visual Basic).

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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