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ReadOnlyObservableCollection(Of T) Class

Represents a read-only ObservableCollection(Of T).

System.Object
  System.Collections.ObjectModel.ReadOnlyCollection(Of T)
    System.Collections.ObjectModel.ReadOnlyObservableCollection(Of T)

Namespace:  System.Collections.ObjectModel
Assembly:  System (in System.dll)
'Declaration
<SerializableAttribute> _
Public Class ReadOnlyObservableCollection(Of T) _
	Inherits ReadOnlyCollection(Of T) _
	Implements INotifyCollectionChanged, INotifyPropertyChanged

Type Parameters

T

The type of elements in the collection.

The ReadOnlyObservableCollection(Of T) type exposes the following members.

  NameDescription
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsReadOnlyObservableCollection(Of T)Initializes a new instance of the ReadOnlyObservableCollection(Of T) class that serves as a wrapper around the specified ObservableCollection(Of T).
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  NameDescription
Public propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsCountGets the number of elements contained in the ReadOnlyCollection(Of T) instance. (Inherited from ReadOnlyCollection(Of T).)
Public propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsItemGets the element at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Protected propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsItemsReturns the IList(Of T) that the ReadOnlyCollection(Of T) wraps. (Inherited from ReadOnlyCollection(Of T).)
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  NameDescription
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsContainsDetermines whether an element is in the ReadOnlyCollection(Of T). (Inherited from ReadOnlyCollection(Of T).)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsCopyToCopies the entire ReadOnlyCollection(Of T) to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from ReadOnlyCollection(Of T).)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetEnumeratorReturns an enumerator that iterates through the ReadOnlyCollection(Of T). (Inherited from ReadOnlyCollection(Of T).)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIndexOfSearches for the specified object and returns the zero-based index of the first occurrence within the entire ReadOnlyCollection(Of T). (Inherited from ReadOnlyCollection(Of T).)
Protected methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Protected methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsOnCollectionChangedRaises the CollectionChanged event using the provided arguments.
Protected methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsOnPropertyChangedRaises the PropertyChanged event using the provided arguments.
Public methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Protected eventSupported by Portable Class LibrarySupported in .NET for Windows Store appsCollectionChangedOccurs when an item is added or removed.
Protected eventSupported by Portable Class LibrarySupported in .NET for Windows Store appsPropertyChangedOccurs when a property value changes.
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  NameDescription
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection(Of T).AddAdds an item to the ICollection(Of T). This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection(Of T).ClearRemoves all items from the ICollection(Of T). This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection.CopyToCopies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection(Of T).IsReadOnlyGets a value indicating whether the ICollection(Of T) is read-only. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection.IsSynchronizedGets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection(Of T).RemoveRemoves the first occurrence of a specific object from the ICollection(Of T). This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsICollection.SyncRootGets an object that can be used to synchronize access to the ICollection. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIEnumerable.GetEnumeratorReturns an enumerator that iterates through a collection. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.AddAdds an item to the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.ClearRemoves all items from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.ContainsDetermines whether the IList contains a specific value. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.IndexOfDetermines the index of a specific item in the IList. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList(Of T).InsertInserts an item to the IList(Of T) at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.InsertInserts an item to the IList at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.IsFixedSizeGets a value indicating whether the IList has a fixed size. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.IsReadOnlyGets a value indicating whether the IList is read-only. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsIList(Of T).ItemGets the element at the specified index. An NotSupportedException occurs if you try to set the item at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertySupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.ItemGets the element at the specified index. An NotSupportedException occurs if you try to set the item at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.RemoveRemoves the first occurrence of a specific object from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList(Of T).RemoveAtRemoves the IList(Of T) item at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodSupported by Portable Class LibrarySupported in .NET for Windows Store appsIList.RemoveAtRemoves the IList item at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate eventSupported by Portable Class LibrarySupported in .NET for Windows Store appsINotifyCollectionChanged.CollectionChangedOccurs when the collection changes.
Explicit interface implemetationPrivate eventSupported by Portable Class LibrarySupported in .NET for Windows Store appsINotifyPropertyChanged.PropertyChangedOccurs when a property value changes.
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This class is a read-only wrapper around an ObservableCollection(Of T). If changes are made to the underlying collection, the ReadOnlyObservableCollection(Of T) reflects those changes. To be notified of the changes to this class, subscribe to the INotifyCollectionChanged.CollectionChanged or INotifyPropertyChanged.PropertyChanged event.

.NET Framework

Supported in: 4.5.1, 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 8, Silverlight 8.1

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.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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