Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

Stack<T>.Enumerator Structure

Enumerates the elements of a Stack<T>.

Namespace:  System.Collections.Generic
Assembly:  System (in System.dll)
public struct Enumerator : IEnumerator<T>, 
	IDisposable, IEnumerator

The Stack<T>.Enumerator generic type exposes the following members.

  NameDescription
Public propertySupported by Silverlight for Windows PhoneSupported by Xbox 360CurrentGets the element at the current position of the enumerator.
Top
  NameDescription
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360DisposeReleases all resources used by the Stack<T>.Enumerator.
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360EqualsIndicates whether this instance and a specified object are equal. (Inherited from ValueType.)
Protected methodSupported by Silverlight for Windows PhoneSupported by Xbox 360FinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360GetHashCodeReturns the hash code for this instance. (Inherited from ValueType.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360GetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneSupported by Xbox 360MemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360MoveNextAdvances the enumerator to the next element of the Stack<T>.
Public methodSupported by Silverlight for Windows PhoneSupported by Xbox 360ToStringReturns the fully qualified type name of this instance. (Inherited from ValueType.)
Top
  NameDescription
Explicit interface implemetationPrivate propertySupported by Silverlight for Windows PhoneSupported by Xbox 360IEnumerator.CurrentGets the element at the current position of the enumerator.
Explicit interface implemetationPrivate methodSupported by Silverlight for Windows PhoneSupported by Xbox 360IEnumerator.ResetSets the enumerator to its initial position, which is before the first element in the collection. This class cannot be inherited.
Top

The foreach statement of the C# language (for each in C++, For Each in Visual Basic) hides the complexity of the enumerators. Therefore, using foreach is recommended, instead of directly manipulating the enumerator.

Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection.

Initially, the enumerator is positioned before the first element in the collection. At this position, Current is undefined. Therefore, you must call MoveNext to advance the enumerator to the first element of the collection before reading the value of Current.

Current returns the same object until MoveNext is called. MoveNext sets Current to the next element.

If MoveNext passes the end of the collection, the enumerator is positioned after the last element in the collection and MoveNext returns false. When the enumerator is at this position, subsequent calls to MoveNext also return false. If the last call to MoveNext returned false, Current is undefined. You cannot set Current to the first element of the collection again; you must create a new enumerator instance instead.

An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is irrecoverably invalidated and its behavior is undefined.

The enumerator does not have exclusive access to the collection; therefore, enumerating through a collection is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.

Default implementations of collections in System.Collections.Generic are not synchronized.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft. All rights reserved.