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IEnumerable Interface

Exposes the enumerator, which supports a simple iteration over a collection.

For a list of all members of this type, see IEnumerable Members.

[Visual Basic]
<Guid("496B0ABE-CDEE-11d3-88E8-00902754C43A")>
Public Interface IEnumerable
[C#]
[Guid("496B0ABE-CDEE-11d3-88E8-00902754C43A")]
public interface IEnumerable
[C++]
[Guid("496B0ABE-CDEE-11d3-88E8-00902754C43A")]
public __gc __interface IEnumerable
[JScript]
public
   Guid("496B0ABE-CDEE-11d3-88E8-00902754C43A")
interface IEnumerable

Classes that Implement IEnumerable

Class Description
Array Provides methods for creating, manipulating, searching, and sorting arrays, thereby serving as the base class for all arrays in the common language runtime.
ArrayList Implements the IList interface using an array whose size is dynamically increased as required.
AttributeCollection Represents a collection of attributes.
BaseChannelObjectWithProperties Provides a base implementation of a channel object that wants to provide a dictionary interface to its properties.
BaseCollection Provides the base functionality for creating data-related collections in the System.Windows.Forms namespace.
BindingContext Manages the collection of BindingManagerBase objects for any object that inherits from the Control class.
BitArray Manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on (1) and false indicates the bit is off (0).
Cache Implements the cache for a Web application. This class cannot be inherited.
CaptureCollection Represents a sequence of capture substrings. CaptureCollection returns the set of captures done by a single capturing group.
CheckedListBox.CheckedIndexCollection Encapsulates the collection of indexes of checked items (including items in an indeterminate state) in a CheckedListBox.
CheckedListBox.CheckedItemCollection Encapsulates the collection of checked items (including items in an indeterminate state) in a CheckedListBox control.
ClerkMonitor Contains a snapshot of all Clerks active in the process.
CodeNamespaceImportCollection Represents a collection of CodeNamespaceImport objects.
CollectionBase Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed collection.
ComboBox.ObjectCollection Represents the collection of items in a ComboBox.
Control.ControlCollection Represents a collection of Control objects
ControlCollection Provides a collection container that enables ASP.NET server controls to maintain a list of their child controls.
CookieCollection Provides a collection container for instances of the Cookie class.
CredentialCache Provides storage for multiple credentials.
DataBindingCollection Provides a collection of DataBinding objects for an ASP.NET server control. This class cannot be inherited.
DataColumnMappingCollection Contains a collection of DataColumnMapping objects.
DataGridColumnCollection A collection of DataGridColumn derived column objects that represent the columns in a DataGrid control. This class cannot be inherited.
DataGridItemCollection Represents a collection of DataGridItem objects in a DataGrid control.
DataKeyCollection Represents a collection that contains the key field of each record in a data source. This class cannot be inherited.
DataListItemCollection Represents the collection of DataListItem objects in the DataList control. This class cannot be inherited.
DataTableMappingCollection A collection of DataTableMapping objects. This class cannot be inherited.
DataView Represents a databindable, customized view of a DataTable for sorting, filtering, searching, editing, and navigation.
DataViewManager Contains a default DataViewSettingCollection for each DataTable in a DataSet.
DataViewSettingCollection Contains a read-only collection of DataViewSetting objects for each DataTable in a DataSet.
DesignerCollection Represents a collection of designers.
DictionaryBase Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed collection of key-and-value pairs.
DirectoryEntries Contains the children (child entries) of an entry in Active Directory.
EventDescriptorCollection Represents a collection of EventDescriptor objects.
EventLogEntryCollection Defines size and enumerators for a collection of EventLogEntry instances.
Evidence Defines the set of information that constitutes input to security policy decisions. This class cannot be inherited.
GridItemCollection Contains a collection of GridItem objects.
GroupCollection Represents a collection of captured groups. GroupCollection returns the set of captured groups in a single match.
Hashtable Represents a collection of key-and-value pairs that are organized based on the hash code of the key.
HtmlTableCellCollection A collection of HtmlTableCell objects that represent the cells in a single row of an HtmlTable control. This class cannot be inherited.
HtmlTableRowCollection A collection of HtmlTableRow objects that represent the rows of an HtmlTable control. This class cannot be inherited.
HttpSessionState Provides access to session-state values as well as session-level settings and lifetime management methods.
HttpStaticObjectsCollection Provides a static objects collection for the StaticObjects property.
HybridDictionary Implements IDictionary by using a ListDictionary while the collection is small, and then switching to a Hashtable when the collection gets large.
ImageList.ImageCollection Encapsulates the collection of Image objects in an ImageList.
InternalDataCollectionBase Provides the base functionality for creating collections.
KeyInfo Represents an XMLDSIG <KeyInfo> element.
LinkLabel.LinkCollection Represents the collection of links within a LinkLabel control.
ListBox.ObjectCollection Represents the collection of items in a ListBox.
ListBox.SelectedIndexCollection Represents the collection containing the indexes to the selected items in a ListBox.
ListBox.SelectedObjectCollection Represents the collection of selected items in the ListBox.
ListDictionary Implements IDictionary using a singly linked list. Recommended for collections that typically contain 10 items or less.
ListItemCollection A collection of ListItem objects in a list control. This class cannot be inherited.
ListView.CheckedIndexCollection Represents the collection containing the indexes to the checked items in a list view control.
ListView.CheckedListViewItemCollection Represents the collection of checked items in a list view control.
ListView.ColumnHeaderCollection Represents the collection of column headers in a ListView control.
ListView.ListViewItemCollection Represents the collection of items in a ListView control.
ListView.SelectedIndexCollection Represents the collection containing the indexes to the selected items in a list view control.
ListView.SelectedListViewItemCollection Represents the collection of selected items in a list view control.
ListViewItem.ListViewSubItemCollection Represents a collection of ListViewItem.ListViewSubItem objects stored in a ListViewItem.
ManagementObjectCollection Represents different collections of management objects retrieved through WMI. The objects in this collection are of ManagementBaseObject-derived types, including ManagementObject and ManagementClass.

The collection can be the result of a WMI query executed through a ManagementObjectSearcher object, or an enumeration of management objects of a specified type retrieved through a ManagementClass representing that type. In addition, this can be a collection of management objects related in a specified way to a specific management object - in this case the collection would be retrieved through a method such as GetRelated.

The collection can be walked using the ManagementObjectCollection.ManagementObjectEnumerator and objects in it can be inspected or manipulated for various management tasks.

MatchCollection Represents the set of successful matches found by iteratively applying a regular expression pattern to the input string.
Menu.MenuItemCollection Represents a collection of MenuItem objects.
MessageQueue Provides access to a queue on a Message Queuing server.
MethodDataCollection Represents the set of methods available in the collection.
NameObjectCollectionBase Provides the abstract (MustInherit in Visual Basic) base class for a collection of associated String keys and Object values that can be accessed either with the key or with the index.
NameObjectCollectionBase.KeysCollection Represents a collection of the String keys of a collection.
OdbcDataReader Provides a way of reading a forward-only stream of data rows from a data source. This class cannot be inherited.
OdbcErrorCollection Collects all errors generated by the OdbcDataAdapter. This class cannot be inherited.
OdbcParameterCollection Represents a collection of parameters relevant to an OdbcCommand as well as their respective mappings to columns in a DataSet. This class cannot be inherited.
OleDbDataReader Provides a way of reading a forward-only stream of data rows from a data source. This class cannot be inherited.
OleDbErrorCollection Collects all errors generated by the .NET Framework Data Provider for OLE DB. This class cannot be inherited.
OleDbParameterCollection Represents a collection of parameters relevant to an OleDbCommand as well as their respective mappings to columns in a DataSet.
OracleDataReader Provides a way of reading a forward-only stream of data rows from a data source. This class cannot be inherited.
OracleParameterCollection Represents a collection of parameters relevant to an OracleCommand as well as their respective mappings to columns in a DataSet. This class cannot be inherited.
PagedDataSource Encapsulates the properties of the DataGrid control that allow it to perform paging. This class cannot be inherited.
PermissionSet Represents a collection that can contain many different types of permissions.
PrinterSettings.PaperSizeCollection Contains a collection of PaperSize objects.
PrinterSettings.PaperSourceCollection Contains a collection of PaperSource objects.
PrinterSettings.PrinterResolutionCollection Contains a collection of PrinterResolution objects.
PropertyCollection Contains the properties of a DirectoryEntry.
PropertyDataCollection Represents the set of properties of a WMI object.
PropertyDescriptorCollection Represents a collection of PropertyDescriptor objects.
PropertyGrid.PropertyTabCollection Contains a collection of PropertyTab objects.
QualifierDataCollection Represents a collection of QualifierData objects.
Queue Represents a first-in, first-out collection of objects.
ReadOnlyCollectionBase Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed read-only collection.
RepeaterItemCollection Represents a collection of RepeaterItem objects in the Repeater control. This class cannot be inherited.
ResourceReader Enumerates .resources files and streams, reading sequential resource name and value pairs.
ResourceSet Stores all the resources localized for one particular culture, ignoring all other cultures, including any fallback rules.
ResXResourceReader Enumerates XML resource (.resx) files and streams, and reads the sequential resource name and value pairs.
SchemaNameCollection Contains a list of the schema names that the SchemaFilter property of a DirectoryEntries object can use.
SearchResultCollection Contains the SearchResult instances that the Active Directory hierarchy returned during a DirectorySearcher query.
SecurityCallers Provides an ordered collection of identities in the current call chain.
SelectedDatesCollection Encapsulates a collection of System.DateTime objects that represent the selected dates in a Calendar control. This class cannot be inherited.
SharedPropertyGroupManager Controls access to shared property groups. This class cannot be inherited.
SignedInfo Contains information about the canonicalization algorithm and signature algorithm used for the XML signature.
SortedList Represents a collection of key-and-value pairs that are sorted by the keys and are accessible by key and by index.
SqlCeErrorCollection Collects all errors generated by the .NET Compact Framework Data Provider for SQL Server CE. This class cannot be inherited.
SqlCeParameterCollection Collects all parameters relevant to a SqlCeCommand as well as their respective mappings to DataSet columns.
SqlDataReader Provides a means of reading a forward-only stream of rows from a SQL Server database. This class cannot be inherited.
SqlErrorCollection Collects all errors generated by the .NET Framework Data Provider for SQL Server. This class cannot be inherited.
SqlParameterCollection Represents a collection of parameters relevant to a SqlCommand as well as their respective mappings to columns in a DataSet. This class cannot be inherited.
Stack Represents a simple last-in-first-out collection of objects.
StateBag Manages the view state of ASP.NET server controls, including pages. This class cannot be inherited.
StatusBar.StatusBarPanelCollection Represents the collection of panels in a StatusBar control.
String Represents text; that is, a series of Unicode characters.
StringCollection Represents a collection of strings.
StringDictionary Implements a hashtable with the key strongly typed to be a string rather than an object.
TabControl.TabPageCollection Contains a collection of TabPage objects.
TableCellCollection Encapsulates a collection of TableHeaderCell and TableCell objects that make up a row in a Table control. This class cannot be inherited.
TableRowCollection Encapsulates a collection of TableRow objects that represent a single row in a Table control. This class cannot be inherited.
TempFileCollection Represents a collection of temporary files.
ToolBar.ToolBarButtonCollection Encapsulates a collection of ToolBarButton controls for use by the ToolBar class.
TraceListenerCollection Provides a thread-safe list of TraceListener objects.
TreeNodeCollection Represents a collection of TreeNode objects.
TypeConverter.StandardValuesCollection Represents a collection of values.
ValidatorCollection Exposes an array of IValidator references. This class cannot be inherited.
XmlNamedNodeMap Represents a collection of nodes that can be accessed by name or index.
XmlNamespaceManager Resolves, adds and removes namespaces to a collection and provides scope management for these namespaces. This class is used by the XsltContext and XmlReader classes.
XmlNode Represents a single node in the XML document.
XmlNodeList Represents an ordered collection of nodes.
XmlSchemaCollection Contains a cache of XML Schema definition language (XSD) and XML-Data Reduced (XDR) schemas. This class cannot be inherited.

Remarks

Notes to Implementers:  

IEnumerable must be implemented to support the ForEach semantics of Microsoft Visual Basic. COM classes that allow enumerators also implement this interface.

Requirements

Namespace: System.Collections

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

Assembly: Mscorlib (in Mscorlib.dll)

See Also

IEnumerable Members | System.Collections Namespace | IEnumerator

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