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 methodReadOnlyObservableCollection(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 propertyCountGets the number of elements contained in the ReadOnlyCollection(Of T) instance. (Inherited from ReadOnlyCollection(Of T).)
Public propertyItemGets the element at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Protected propertyItemsReturns the IList(Of T) that the ReadOnlyCollection(Of T) wraps. (Inherited from ReadOnlyCollection(Of T).)
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  NameDescription
Public methodContainsDetermines whether an element is in the ReadOnlyCollection(Of T). (Inherited from ReadOnlyCollection(Of T).)
Public methodCopyToCopies 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 methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetEnumeratorReturns an enumerator that iterates through the ReadOnlyCollection(Of T). (Inherited from ReadOnlyCollection(Of T).)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIndexOfSearches 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 methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Protected methodOnCollectionChangedRaises the CollectionChanged event using the provided arguments.
Protected methodOnPropertyChangedRaises the PropertyChanged event using the provided arguments.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Protected eventCollectionChangedOccurs when an item is added or removed.
Protected eventPropertyChangedOccurs when a property value changes.
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  NameDescription
Explicit interface implemetationPrivate methodICollection(Of T).AddAdds an item to the ICollection(Of T). This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodICollection(Of T).ClearRemoves all items from the ICollection(Of T). This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodICollection.CopyToCopies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyICollection(Of T).IsReadOnlyGets a value indicating whether the ICollection(Of T) is read-only. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyICollection.IsSynchronizedGets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodICollection(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 propertyICollection.SyncRootGets an object that can be used to synchronize access to the ICollection. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIEnumerable.GetEnumeratorReturns an enumerator that iterates through a collection. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList.AddAdds an item to the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList.ClearRemoves all items from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList.ContainsDetermines whether the IList contains a specific value. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList.IndexOfDetermines the index of a specific item in the IList. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList(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 methodIList.InsertInserts an item to the IList at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyIList.IsFixedSizeGets a value indicating whether the IList has a fixed size. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyIList.IsReadOnlyGets a value indicating whether the IList is read-only. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyIList(Of T).ItemGets or sets the element at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate propertyIList.ItemGets or sets the element at the specified index. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList.RemoveRemoves the first occurrence of a specific object from the IList. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate methodIList(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 methodIList.RemoveAtRemoves the IList item at the specified index. This implementation always throws NotSupportedException. (Inherited from ReadOnlyCollection(Of T).)
Explicit interface implemetationPrivate eventINotifyCollectionChanged.CollectionChangedOccurs when the collection changes.
Explicit interface implemetationPrivate eventINotifyPropertyChanged.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, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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