Foundation Namespace

The Foundation namespace provides lower-level classes in the Objective-C world. Often these classes have equivalents in the .NET Base Class Library.

Classes

ActionAttribute	Flags a method to respond to an Objective-C action
AdviceAttribute	An attribute that can be used to give programming advice to a user of a function or class.
ConnectAttribute	Exposes a property as an Interface Builder Outlet.
DictionaryContainer	Convenience base class used by strongly-typed classes that wrap NSDictionary-based settings.
EncodingDetectionOptions	A DictionaryContainer containing hints for detecting the encoding of an NSString.
ExportAttribute	Exports a method or property to the Objective-C world.
FieldAttribute	This attribute is present on properties to indicate that they reflect an underlying unmanaged global variable.
LinkerSafeAttribute	Assembly-level attributed used to inform MonoTouch's linker that this assembly can be safely linked, regardless of the system linker settings.
LoadInPlaceResult
ModelAttribute	Flag a class as a model.
ModelNotImplementedException	An convenience exception used in Model method implementations.
MonoTouchException	Exception throw to wrap NSExceptions.
NotImplementedAttribute
NSArchiveReplaceEventArgs	Provides data for the ReplacingObject and E:Foundation.NSArchiveReplaceEventArgs.ReplacingObject events.
NSArray	An untyped Objective-C array.
NSArray<TKey>
NSAttributedString	Strings that can be annotated with a set of attributes.
NSAttributedStringDocumentAttributes	A DictionaryContainer that provides document attributes for NSAttributedStrings.
NSAutoreleasePool	A class used to keep track of objects to be released at a later time.
NSBlockOperation	A subtype of NSOperation that concurrently executes multiple blocks.
NSBundle	Application bundle support; Introspection services.
NSBundleResourceRequest	Requests on-demand downloadable resources available from the App Store.
NSBundleResourceRequest.Notifications
NSByteCountFormatter	A class that can format a string for displaying a count of bytes.
NSCache	A collection of key-value pairs, often containing values of type INSDiscardableContent, intended to hold transient, but expensive-to-calculate, data.
NSCacheDelegate	When overridden, allows the application developer fine-grained control over the eviction or removal of elements from an NSCache.
NSCacheDelegate_Extensions	Extension methods to the INSCacheDelegate interface to support all the methods from the NSCacheDelegate protocol.
NSCachedUrlResponse	An object that can be stored and retrieved by instances of NSUrlCache, combining objects representing the response, data, and application-specific information.
NSCalendar	Calendar reprensetation.
NSCalendar.Notifications	Notification posted by the NSCalendar class.
NSCharacterSet	A class that encapsulates an immutable set of Unicode characters.
NSCoder	Serialization framework for NSObjects.
NSCoding	Defines the methods that must be implemented for serializing and deserializing objects using Cocoa's serialization technology.
NSComparisonPredicate	A subtype of NSPredicate that is used to compare NSExpressions.
NSCompoundPredicate	A subtype of NSPredicate that is used to calculate Boolean logical operations.
NSCondition	Encapsulates POSIX-like conditions.
NSConditionLock	Allows objects to acquire thread locks based on NSCondition objects.
NSCopying	Concrete implementation of the INSCopying interface.
NSData	Byte buffer manipulation.
NSDataDetector	Subclass of NSRegularExpression with support for specific types of data (dates, addresses, etc.).
NSDate	Date operations.
NSDateComponents	Represents a date in a specific NSCalendar.
NSDateComponentsFormatter	Formats NSDateComponents objects as localized strings. Can represent, for instance, hours and minutes as "2h 20m".
NSDateFormatter	Used to parse and render dates in various forms.
NSDateInterval	Native class for calculating the difference between dates.
NSDateIntervalFormatter	Outputs date ranges in localized format (for instance, "Tuesday, Sept 2, 2014 - Thursday, Sept 4, 2014").
NSDecimalNumber	Objective-C Decimal number.
NSDictionary	Dictionary that provides mapping from keys to values.
NSDictionary<TKey,TValue>
NSDimension	Base class for NSUnit objects that represent dimensional quantities.
NSDirectoryEnumerator	Enumerates the contents of a directory.
NSDistributedNotificationCenter	Allows notifications to be sent to objects in other tasks.
NSEnergyFormatter	Formats Joule and Calorie data as a localized string.
NSEnumerator	Abstract class used to enumerate certain MonoTouch.Foundation classes.
NSError	Encapsulates an error.
NSErrorEventArgs	Provides data for the Failed and E:Foundation.NSErrorEventArgs.LoadingMapFailed, E:Foundation.NSErrorEventArgs.DeferredUpdatesFinished and E:Foundation.NSErrorEventArgs.Failed and E:Foundation.NSErrorEventArgs.Failed and E:Foundation.NSErrorEventArgs.AdvertisingStarted, E:Foundation.NSErrorEventArgs.DiscoveredService and E:Foundation.NSErrorEventArgs.RssiUpdated events.
NSErrorException	Exception that wraps an Objective-C NSError.
NSException	Objective-C Exception.
NSExpression	Encapsulates an expression to be used with a NSComparisonPredicates.
NSExtensionContext	The context in which an extension is running.
NSExtensionContext.Notifications	Class that contains handlers for extension context notifications.
NSExtensionItem	An immutable collection of data regarding the object which the extension is manipulating.
NSExtensionRequestHandling	Defines the BeginRequestWithExtensionContext(NSExtensionContext) lifecycle hook.
NSFileAccessIntent	Holds the details of asynchronous read and write operations being coordinated by a NSFileCoordinator.
NSFileAttributes	Encapsulates file attributes for use with NSFileManager.
NSFileCoordinator	A class that helps coordinate simultaneous reading and writing to files among multiple processes and multiple objects.
NSFileHandle	Encapsulates a file descriptor.
NSFileHandle.Notifications	Notification posted by the NSFileHandle class.
NSFileHandleConnectionAcceptedEventArgs	Provides data for the event.
NSFileHandleReadEventArgs	Provides data for the event.
NSFileManager	An abstraction over the underlying file system that allows for common file discovery and manipulation actions.
NSFileManager_NSUserInformation
NSFileManager.Notifications	Notification posted by the NSFileManager class.
NSFileManagerDelegate	A delegate that, when overridden, allows the application developer fine-grained control over events relating to common file discovery and manipulation actions.
NSFileManagerDelegate_Extensions	Extension methods to the INSFileManagerDelegate interface to support all the methods from the NSFileManagerDelegate protocol.
NSFilePresenter	In conjunction with a NSFileCoordinator, allows the application developer to respond to events relating to the presentation of a file.
NSFilePresenter_Extensions	Extension methods to the INSFilePresenter interface to support all the methods from the NSFilePresenter protocol.
NSFileProviderService	A communication channel between the developer's app and a File Provider extension.
NSFileSystemAttributes	File system attributes (size, blocks and free information).
NSFileVersion	A snapshot of a file at a specific point in time.
NSFileWrapper	Encapsulates the attributes and contents of file-system nodes, which include files, directories, and symbolic links.
NSFormatter	Base class for NSDateFormatter, provides methods for parsing and rendering types.
NSHttpCookie	HTTP Cookie
NSHttpCookieStorage	A singleton object that manages a collection of NSHttpCookies.
NSHttpCookieStorage.Notifications	Class that contains handlers for cookie storage notifications.
NSHttpUrlResponse	Represents the response from an HTTP request.
NSIndexPath	Represents the path to a node in a tree. In iOS this class is most commonly used to identify a row in a UITableView.
NSIndexSet	An immutable collection of unique unsigned integers that are stored as a collection of sorted ranges (and thus is unsuitable as a general collection class).
NSInputStream	A read-only input NSStream.
NSInvocation	Represents an Objective-C message (method call) that can be serialized, stored, etc. primarily by <see cref=T:MonoTouch.Foundation.NSTimer/> objects.
NSIso8601DateFormatter	Formats NSDate objects.
NSItemDownloadingStatusExtensions
NSItemProvider	Coordinates the data used by an NSExtensionItem and its P:Foundation.NSExtensionItem.Properties.
NSItemProviderWriting_Extensions
NSJavaScriptExtension	Defines the strings associated with the constants NSExtensionJavaScriptFinalizeArgumentKey and NSExtensionJavaScriptPreprocessingResultsKey.
NSJsonSerialization	Allows conversion of a limited set of Foundation types to and from JSON.
NSKeyedArchiver	A concrete implementation of NSCoder that serializes to files.
NSKeyedArchiverDelegate	Methods that can be invoked by the NSKeyedArchiver during serialization.
NSKeyedArchiverDelegate_Extensions	Extension methods to the INSKeyedArchiverDelegate interface to support all the methods from the NSKeyedArchiverDelegate protocol.
NSKeyedUnarchiver	A concrete subclass of NSCoder used to deserialize state from files.
NSKeyedUnarchiverDelegate	Methods that can be invoked by the NSKeyedUnarchiver during serialization.
NSKeyedUnarchiverDelegate_Extensions	Extension methods to the INSKeyedUnarchiverDelegate interface to support all the methods from the NSKeyedUnarchiverDelegate protocol.
NSKeyValueSorting_NSMutableOrderedSet	Defines an extension method for T:NSMutableOrderedSet objects, allowing them to be sorted using NSSortDescriptor objects.
NSKeyValueSorting_NSOrderedSet	Defines an extension method for NSOrderedSet objects, allowing sorting by NSSortDescriptor objects.
NSLengthFormatter	Formats distances as localized strings.
NSLinguisticAnalysis
NSLinguisticTag	Contains read-only static properties corresponding to the parts of speech recognized by a NSLinguisticTagger.
NSLinguisticTagger	Automatically segments text into parts of speech (e.g., nouns, verbs, numbers, etc.).
NSLinguisticTagSchemeExtensions
NSLinguisticTagUnitExtensions
NSLocale	Encapsulates parameters about user language, cultural and technical conventions.
NSLocale.Notifications	Notification posted by the NSLocale class.
NSLock	A system-level thread locking object.
NSMachPort	An NSPort that represents a Mach port. Only can be used for local-machine communication (see T:Foundation.NSSocketPort).
NSMachPortDelegate	The delegate object for NSMachPort objects. Provides events for received messages.
NSMachPortDelegate_Extensions	Extension methods to the INSMachPortDelegate interface to support all the methods from the NSMachPortDelegate protocol.
NSMassFormatter	Formats masses as localized strings.
NSMeasurement<UnitType>
NSMeasurementFormatter	Enumerates measurement option flags.
NSMetadataItem	The metadata associated with a file.
NSMetadataQuery	A query of Spotlight metadata.
NSMetadataQuery.Notifications	Notification posted by the NSMetadataQuery class.
NSMetadataQueryAttributeValueTuple	Tuples that encapsulate an attribute, a value, and the count of times that value occurs for the attribute.
NSMetadataQueryDelegate	Defines optional methods relating to the lifecycle of NSMetadataQuerys.
NSMetadataQueryDelegate_Extensions	Extension methods to the INSMetadataQueryDelegate interface to support all the methods from the NSMetadataQueryDelegate protocol.
NSMetadataQueryResultGroup	A collection of grouped results returned by a NSMetadataQuery.
NSMethodSignature	Represents a function signature. Returned by the MethodSignature property.
NSMutableArray	An ordered, changeable collection of objects.
NSMutableArray<TValue>
NSMutableAttributedString	Mutable strings that can be annotated with a set of attributes.
NSMutableCharacterSet	A mutable T:NSFoundation.NSCharacterSet: a set of Unicode characters.
NSMutableCopying	Implementors of the INSMutableCopying interface produce mutable copies of an object. Types that do not have mutable and immutable subtypes should instead implement NSCopying.
NSMutableData	Dynamic byte buffer manipulation.
NSMutableDictionary	A changeable collection of key-value pairs, with unique keys.
NSMutableDictionary<TKey,TValue>
NSMutableIndexSet	Represents a mutable collection of unique, unsigned integers (T:System.UInt32). These integers are also known as indexes.
NSMutableOrderedSet	A mutable T:NSFoundation.NSOrderedSet.
NSMutableOrderedSet<TKey>
NSMutableSet	An unordered, changeable collection of unique objects.
NSMutableSet<TKey>
NSMutableString	The Foundation framework mutable string class.
NSMutableUrlRequest	Encapsulates a URL request, can be modified after creation.
NSNetDomainEventArgs	Provides data for the FoundDomain and E:Foundation.NSNetDomainEventArgs.FoundDomain events.
NSNetService	Used to expose network services using multicast DNS (ZeroConf).
NSNetServiceBrowser	Network service browser for ZeroConf-provided services.
NSNetServiceBrowserDelegate	Delegate class for NSNetService.
NSNetServiceBrowserDelegate_Extensions	Extension methods to the INSNetServiceBrowserDelegate interface to support all the methods from the NSNetServiceBrowserDelegate protocol.
NSNetServiceConnectionEventArgs	Provides data for the DidAcceptConnection event.
NSNetServiceDataEventArgs	Provides data for the UpdatedTxtRecordData event.
NSNetServiceDelegate	Delegate class for NSNetService.
NSNetServiceDelegate_Extensions	Extension methods to the INSNetServiceDelegate interface to support all the methods from the NSNetServiceDelegate protocol.
NSNetServiceErrorEventArgs	Provides data for the NotSearched and E:Foundation.NSNetServiceErrorEventArgs.ResolveFailure and E:Foundation.NSNetServiceErrorEventArgs.NotSearched events.
NSNetServiceEventArgs	Provides data for the ServiceRemoved and E:Foundation.NSNetServiceEventArgs.ServiceRemoved events.
NSNotification	Inter-application messages that are broadcast on the NSNotificationCenter.
NSNotificationCenter	A notification hub for the application.
NSNotificationEventArgs	Provides data for the event.
NSNotificationQueue	A class that represents a buffer for instances of NSNotificationCenter, allowing notifications to be buffered and coalesced.
NSNull	Encapsulates a singleton object that can be used to represent a null value. Note that this singleton will not evaluate as equal to null.
NSNumber	Binding to Objective-C API to box numbers (value types).
NSNumberFormatter	Represents numbers as strings, with a variety of formatting options.
NSObject	Base class for all bound objects that map to Objective-C objects.
NSObjectEventArgs	Provides data for the EncodedObject and E:Foundation.NSObjectEventArgs.WillEvictObject events.
NSObjectFlag	Sentinel class used by the MonoTouch framework.
NSObjectProtocol_Extensions	Extension class that, together with the INSObjectProtocol interface, comprise the NSObjectProtocol protocol.
NSObservedChange	Changes that ocurred to an object being observed by Key-Value-Observing
NSOperation	A class that encapsulates the code and data necessary to perform a task that can be executed on a thread. Application developers should either inherit from this class or use a predefined subclass such as T:Foundation.NSInvocationOperation or NSBlockOperation.
NSOperationQueue	A class that coordinates and manages the execution of a sequence of NSOperation objects.
NSOrderedSet	An immutable collection of objects, that are sorted and unique.
NSOrderedSet<TKey>
NSOrthography	A class that associates a dominant language and script with a piece of text. It is used primarily for purposes such as spell- and grammar-checking.
NSOutputStream	A write-only NSStream.
NSPersonNameComponent	Represents the components of a person name.
NSPersonNameComponents	Defines elements of a person's name, to be used with Name.
NSPersonNameComponentsFormatter	Provides a localized representation of a NSPersonNameComponents.
NSPipe	A class that encapsulates an operating system pipe.
NSPort	A communications port on the device.
NSPortDelegate	The delegate object for T:NSFoundation.NSPort objects. Provides an event for message received.
NSPortDelegate_Extensions	Extension methods to the INSPortDelegate interface to support all the methods from the NSPortDelegate protocol.
NSPortMessage	Holds a message received by a T:NSFoundation.NSPort.
NSPredicate	A class that represents an expression that, when evaluated, returns a boolean result.
NSPredicateSupport_NSArray	Extension method for NSArray objects, allowing them to be filtered with a NSPredicate.
NSPredicateSupport_NSMutableArray	Helper metohds for applying predicates to mutable arrays.
NSPredicateSupport_NSMutableOrderedSet	Defines an extension method for NSMutableOrderedSet objects allowing them to be filtered using a NSPredicate.
NSPredicateSupport_NSMutableSet	Extension method for NSMutableSet objects, allowing them to be filtered with a NSPredicate.
NSPredicateSupport_NSOrderedSet	Defines an extension method for NSOrderedSet objects allowing them to be filtered via an NSPredicate.
NSPredicateSupport_NSSet	Helper methods for applying predicates to sets.
NSProcessInfo	A class that provides information such as arguments, environment variables, and names about the current process.
NSProcessInfo.Notifications
NSProgress	Used with long-running processes to report progress to the end-user.
NSProgressReporting_Extensions	Extension methods to the INSProgressReporting interface to support all the methods from the INSProgressReporting protocol.
NSPropertyListSerialization	A class that provides methods for serializing and deserializing property lists.
NSPurgeableData	A type of NSMutableData whose data's memory can be freed by the system as required.
NSRecursiveLock	A subclass of NSLock that may be acquired multiple times by the same thread.
NSRegularExpression	System library for regular expressions.
NSRunLoop	Message and event dispatching loop.
NSRunLoopModeExtensions
NSSearchPath	Search paths utilities.
NSSecureCoding	Implementors handle encoding and decoding in a manner robust against object-substitution attacks.
NSSecureUnarchiveFromDataTransformer
NSSet	An unordered collection of distinct items.
NSSet<TKey>	Strongly-typed NSSet.
NSSortDescriptor	Provides a comparison operator that can be used with Core Data and objects such as NSArray.
NSSortDescriptorSorting_NSMutableArray	Defines a static method for sorting NSMutableArray objects using NSSortDescriptor objects.
NSStream	Abstract class for Foundation Streams.
NSStreamDelegate	When overridden, allows the applicatin developer to respond to events releated to maniplating an NSStream.
NSStreamDelegate_Extensions	Extension methods to the INSStreamDelegate interface to support all the methods from the NSStreamDelegate protocol.
NSStreamEventArgs	Provides data for the OnEvent event.
NSStreamSocksOptions	Configuration options for SOCKS proxy servers.
NSString	The Foundation String class.
NSStringDrawingContext	Configures and track the scale factor and tracking adjustements used when drawing attributed strings.
NSStringTransformExtensions
NSTextChecking	Contains keys that identify text checking results.
NSTextCheckingAddressComponents	Contains the components of a recognized address.
NSTextCheckingResult	Class that contains the result of a regular expression search.
NSTextCheckingTransitComponents	Contains the components of a recognized travel data.
NSThread	NSThread support.
NSTimer	The timer can trigger actions at certain time intervals.
NSTimeZone	Encapsulates a time zone.
NSUbiquitousKeyValueStore	An iCloud-based key-value store intended for the storage of configuration and state-preservation data.
NSUbiquitousKeyValueStore.Notifications	Notification posted by the NSUbiquitousKeyValueStore class.
NSUbiquitousKeyValueStoreChangeEventArgs	Provides data for the event.
NSUndoManager	Undo manager class.
NSUndoManager.Notifications	Notification posted by the NSUndoManager class.
NSUndoManagerCloseUndoGroupEventArgs	Provides data for the event.
NSUnit	Base class for units of measure.
NSUnitAcceleration	A rate of change of velocity. Base unit is metersPerSecondSquared.
NSUnitAngle	Measures rotation in a plane. Base unit is degrees.
NSUnitArea	An NSDimension describing a two-dimensional extent. The base unit is square meters.
NSUnitConcentrationMass	An NSDimension that represents the amount of a mass within a volume. The base unit is grams / liter.
NSUnitConverter	Abstract base class for classes that convert values between appropriate types of NSUnit.
NSUnitConverterLinear	A NSUnitConverter that applies a conversion of the form f(X) = cX + k.
NSUnitDispersion	A NSDimension that is a ratio of a component constituent to all constituents. The base unit is "parts per million".
NSUnitDuration	A NSDimension that represents a span of time. The base unit is seconds.
NSUnitElectricCharge	An NSDimension that represents electric charge. The base unit is coulombs.
NSUnitElectricCurrent	A flow of electric current. The base unit is amperes.
NSUnitElectricPotentialDifference	A NSDimension that measures potential electric energy of a point charge at a single point in space. The base unit is volts.
NSUnitElectricResistance	A NSDimension that measures electrical resistance. The base unit is ohms.
NSUnitEnergy	An NSDimension that represents units of energy. The base unit is joules.
NSUnitFrequency	An NSDimension that measures how often something repeats. The base unit is hertz.
NSUnitFuelEfficiency	An NSDimension that represents the distance traveled per unit of fuel. The base unit is liters / 100 kilometers.
NSUnitIlluminance	An NSDimension that measures illuminance. The base unit is lux.
NSUnitLength	An NSDimension that measures extent. The base unit is meters.
NSUnitMass	A NSDimension that describes resistance to acceleration. The base unit is kilograms.
NSUnitPower	A NSDimension that measures energy over time. The base unit is watts.
NSUnitPressure	A NSDimension that measures normal force over a surface. The base unit is pascals.
NSUnitSpeed	A NSDimension that measures the rate of change of position. The base unit is meters / second.
NSUnitTemperature	A NSDimension that measures thermal energy. The base unit is kelvin.
NSUnitVolume	A sNSDimension that measures extent in 3 dimensions. The base unit is liters.
NSUrl	Represents a URL.
NSUrl_PromisedItems	Defines static methods for dealing with promised items.
NSUrlAsyncResult	Results from SendRequestAsync(NSUrlRequest, NSOperationQueue)
NSUrlAuthenticationChallenge	Represents an authentication challenge sent from a server to a client.
NSURLAuthenticationChallengeSender	Protocol for implementing authentication challenges.
NSURLAuthenticationChallengeSender_Extensions	Extension methods to the INSURLAuthenticationChallengeSender interface to support all the methods from the NSURLAuthenticationChallengeSender protocol.
NSUrlCache	Caches URL load requests with a combination of in-memory and on-disk strategies.
NSUrlComponents	Parses and constructs URLs according to the components defined in RFC 3986.
NSUrlConnection	A Web Client.
NSUrlConnectionDataDelegate	Protocol that contains handlers for working with data over an HTTP connection.
NSUrlConnectionDataDelegate_Extensions	Extension methods to the INSUrlConnectionDataDelegate interface to support all the methods from the NSUrlConnectionDataDelegate protocol.
NSUrlConnectionDelegate	Delegate class used by the Web Client NSUrlConnection.
NSUrlConnectionDelegate_Extensions	Extension methods to the INSUrlConnectionDelegate interface to support all the methods from the NSUrlConnectionDelegate protocol.
NSUrlConnectionDownloadDelegate	When overridden, allows customization of events relating to data received by file download via a URL.
NSUrlConnectionDownloadDelegate_Extensions	Extension methods to the INSUrlConnectionDownloadDelegate interface to support all the methods from the NSUrlConnectionDownloadDelegate protocol.
NSUrlCredential	Authentication credentials
NSUrlCredentialStorage	Manages the URL credential storage.
NSUrlCredentialStorage.Notifications	Notification posted by the NSUrlCredentialStorage class.
NSUrlProtectionSpace	Represents a realm on a server that requires authentication.
NSUrlProtocol	A base class for providing protocol-specific URL loading.
NSUrlQueryItem	A single key-value pair that is part of the query portion of a URL.
NSUrlRequest	A Url Load request.
NSUrlResponse	Used to read the response from an NSUrlRequest.
NSUrlSession	Coordinates a set of data-transfer tasks, including large background tasks.
NSUrlSessionActiveTasks	Holds the return values from the asynchronous method GetTasksAsync().
NSUrlSessionActiveTasks2	Contains active tasks for an NSUrlSession.
NSUrlSessionCombinedTasks
NSUrlSessionConfiguration	Encapsulates the configuration to be used with a NSUrlSession.
NSUrlSessionDataDelegate	The delegate object for NSUrlSessionDataTask class, providing events relating to data upload and download.
NSUrlSessionDataDelegate_Extensions	Extension methods to the INSUrlSessionDataDelegate interface to support all the methods from the NSUrlSessionDataDelegate protocol.
NSUrlSessionDataTask	A NSUrlSessionTask that transfers data as NSData.
NSUrlSessionDataTaskRequest	Holds the return values from the NSUrlSession.Create*TaskAsync methods.
NSUrlSessionDelegate	The delegate object for NSUrlSession objects.
NSUrlSessionDelegate_Extensions	Extension methods to the INSUrlSessionDelegate interface to support all the methods from the NSUrlSessionDelegate protocol.
NSUrlSessionDownloadDelegate	The delegate object for a NSUrlSessionDownloadTask, provides events relating to large data downloads.
NSUrlSessionDownloadDelegate_Extensions	Extension methods to the INSUrlSessionDownloadDelegate interface to support all the methods from the NSUrlSessionDownloadDelegate protocol.
NSUrlSessionDownloadTask	Developers should use NSUrlDownloadSessionResponse rather than this deprecated type.
NSUrlSessionDownloadTaskRequest	This class holds the return values from the asynchronous methods CreateDownloadTaskFromResumeDataAsync(NSData, NSUrlSessionDownloadTask), CreateDownloadTaskFromResumeDataAsync(NSData, NSUrlSessionDownloadTask), CreateDownloadTaskFromResumeDataAsync(NSData, NSUrlSessionDownloadTask).
NSUrlSessionStreamDataRead
NSUrlSessionStreamDelegate	Delegate object for NSUrlSession objects that have NSUrlSessionStreamTask objects.
NSUrlSessionStreamDelegate_Extensions	Extension methods to the INSUrlSessionStreamDelegate interface to support all the methods from the NSUrlSessionStreamDelegate protocol.
NSUrlSessionStreamTask	A subclass of NSUrlSessionTask that provides APIs for asynchonous reads and writes.
NSUrlSessionTask	The base class for data-transfer tasks created by a NSUrlSession.
NSUrlSessionTaskDelegate	The delegate object for T:Foundation.NSUrlSessionTaskUpload objects, providing events relating to file uploads.
NSUrlSessionTaskDelegate_Extensions	Extension methods to the INSUrlSessionTaskDelegate interface to support all the methods from the NSUrlSessionTaskDelegate protocol.
NSUrlSessionTaskMetrics	Holds data on the execution of a NSUrlSessionTask.
NSUrlSessionTaskPriority	Defines constants for use with Priority.
NSUrlSessionTaskTransactionMetrics	Holds data on individual request/response pairs within a NSUrlSessionTask.
NSUrlSessionUploadTask	An NSUrlSessionDataTask that is used to upload data.
NSUrlUtilities_NSCharacterSet	Defines static methods defining character sets for various subcomponents of a NSUrl.
NSUrlUtilities_NSString	Defines static methods for URL encoding and escaping.
NSUserActivity	A user behavior that may be continued on another device. (Currently only browsing the Web, see NSUserActivityType).
NSUserActivityContinuation	Holds the continuation streams returned by the GetContinuationStreamsAsync() method.
NSUserActivityDelegate	Delegate object for NSUserActivity objects, exposing events relating to an activity begun on one device and continued on another.
NSUserActivityDelegate_Extensions	Extension methods to the INSUserActivityDelegate interface to support all the methods from the NSUserActivityDelegate protocol.
NSUserActivityType	Defines types of NSUserActivity available from the system (currently only browsing the Web).
NSUserDefaults	Provides access to the user defaults.
NSUserDefaults.Notifications
NSUuid	A class for creating and representing universally-unique identification strings (UUIDs).
NSValue	Binding to the Objective-C way of boxing value types.
NSValueTransformer	Abstract class that supports converting between value representations. Primarily used internally by Cocoa.
NSValueTransformer.Notifications
NSXpcListenerEndpoint	Names a specific XPC listener.
NSZone	An OS-controlled area within memory from which objects are allocated.
OutletAttribute	Exposes the given property as an outlet to the Objective-C world.
PreserveAttribute	Prevents the MonoTouch linker from linking the target.
ProtocolAttribute	Attribute applied to interfaces that represent Objective-C protocols.
ProtocolMemberAttribute
RegisterAttribute	Used to register a class to the Objective-C runtime.
You_Should_Not_Call_base_In_This_Method	This class exits purely as a warning to future generations.   You called a method using “base”, but this was not required.

Structs

NSDecimal	Represents an immutable value that can range from mantissa*10^exponent where mantissa is a decimal integer of up to 38 digits length, and the exponent is an integer that can range from -128 through 127.
NSOperatingSystemVersion	Defines the operating system version. Particularly for use with the IsOperatingSystemAtLeastVersion(NSOperatingSystemVersion) method.
NSRange	Represents a range given by a location and length.

Interfaces

INSCacheDelegate	Interface representing the required methods (if any) of the protocol NSCacheDelegate.
INSCoding	Interface representing the required methods (if any) of the protocol NSCoding.
INSCopying	Interface representing the required methods (if any) of the protocol NSCopying.
INSDiscardableContent	Interface for a class that can save memory by discarding some of its subcomponents when they are not in use.
INSExtensionRequestHandling	Interface representing the required methods (if any) of the protocol NSExtensionRequestHandling.
INSFileManagerDelegate	Interface representing the required methods (if any) of the protocol NSFileManagerDelegate.
INSFilePresenter	Interface representing the required methods (if any) of the protocol NSFilePresenter.
INSItemProviderReading
INSItemProviderWriting	Interface used by NSItemProvider for retrieving data from an object.
INSKeyedArchiverDelegate	Interface representing the required methods (if any) of the protocol NSKeyedArchiverDelegate.
INSKeyedUnarchiverDelegate	Interface representing the required methods (if any) of the protocol NSKeyedUnarchiverDelegate.
INSLocking	Interface that, together with the T:Foundation.NSLocking_Extensions class, comprise the NSLocking protocol.
INSMachPortDelegate	Interface representing the required methods (if any) of the protocol NSMachPortDelegate.
INSMetadataQueryDelegate	Interface representing the required methods (if any) of the protocol NSMetadataQueryDelegate.
INSMutableCopying	Interface representing the required methods (if any) of the protocol NSMutableCopying.
INSNetServiceBrowserDelegate	Interface representing the required methods (if any) of the protocol NSNetServiceBrowserDelegate.
INSNetServiceDelegate	Interface representing the required methods (if any) of the protocol NSNetServiceDelegate.
INSObjectProtocol	Base-level object protocol required to be considered a first class Objective-C object.
INSPortDelegate	Interface representing the required methods (if any) of the protocol NSPortDelegate.
INSProgressReporting	Interface representing the required methods (if any) of the protocol INSProgressReporting.
INSSecureCoding	The secure coding category.
INSStreamDelegate	Interface representing the required methods (if any) of the protocol NSStreamDelegate.
INSURLAuthenticationChallengeSender	Interface representing the required methods (if any) of the protocol NSURLAuthenticationChallengeSender.
INSUrlConnectionDataDelegate	Interface representing the required methods (if any) of the protocol NSUrlConnectionDataDelegate.
INSUrlConnectionDelegate	Interface representing the required methods (if any) of the protocol NSUrlConnectionDelegate.
INSUrlConnectionDownloadDelegate	Interface representing the required methods (if any) of the protocol NSUrlConnectionDownloadDelegate.
INSUrlProtocolClient	The URL protocol client category.
INSUrlSessionDataDelegate	Interface representing the required methods (if any) of the protocol NSUrlSessionDataDelegate.
INSUrlSessionDelegate	Interface representing the required methods (if any) of the protocol NSUrlSessionDelegate.
INSUrlSessionDownloadDelegate	Interface representing the required methods (if any) of the protocol NSUrlSessionDownloadDelegate.
INSUrlSessionStreamDelegate	Interface representing the required methods (if any) of the protocol NSUrlSessionStreamDelegate.
INSUrlSessionTaskDelegate	Interface representing the required methods (if any) of the protocol NSUrlSessionTaskDelegate.
INSUserActivityDelegate	Interface representing the required methods (if any) of the protocol NSUserActivityDelegate.

Enums

NSActivityOptions	A flagging enumeration whose values can be used with BeginActivity(NSActivityOptions, String).
NSAlignmentOptions	An enumeration of values used by alignment functions.
NSAttributedStringEnumeration	An enumeration whose values specify the options to be used in the EnumerateAttribute(NSString, NSRange, NSAttributedStringEnumeration, NSAttributedStringCallback) and EnumerateAttributes(NSRange, NSAttributedStringEnumeration, NSAttributedRangeCallback) methods.
NSBundleExecutableArchitecture	The bundle's architecture.
NSByteCountFormatterCountStyle	An enumeration whose values specify how byte units are calculated (e.g., if "KB" indicates 1000 or 1024 bytes).
NSByteCountFormatterUnits	An enumeration whose values specify the units to be displayed by a NSByteCountFormatter.
NSCalculationError	An enumeration whose values indicate a specific calculation error (e.g., underflow, division by zero, loss of precision).
NSCalendarOptions	A flagging enumeration whose values specify options in calls to M:NSFoundation.NSCalendar.Components* and DateByAddingComponents(NSDateComponents, NSDate, NSDateComponentsWrappingBehavior).
NSCalendarType	Calendar types that can be used with the NSCalendar constructor.
NSCalendarUnit	An enumeration whose values specify calendrical units (e.g., seconds, months, eras).
NSCocoaError	Enumeration of various errors relating to Cocoa development.
NSComparisonPredicateModifier	An enumeration whose values specify how a NSComparisonPredicate should apply to an n-to-many relationship.
NSComparisonPredicateOptions	An enumeration whose values specify the type of string comparison to be used in a NSComparisonPredicate.
NSComparisonResult	Comparison result in the Foundation Framework.
NSCompoundPredicateType	An enumeration whose values specify the Boolean logical operator to be applied to a NSCompoundPredicate.
NSDataBase64DecodingOptions	A flagging enumeration that can be used with the C:Foundation.NSData(Foundation.NSData,Foundation.NSDataBase64DecodingOptions constructor.
NSDataBase64EncodingOptions	A flagging enumeration that can be used to specify options for GetBase64EncodedData(NSDataBase64EncodingOptions) and GetBase64EncodedString(NSDataBase64EncodingOptions).
NSDataReadingOptions	Flags that determine how NSData loads files.
NSDataSearchOptions	Flags controling the search in NSData's Find method.
NSDataWritingOptions	An enumeration of options to be used when writing NSData objects.
NSDateComponentsFormatterUnitsStyle	Enumerates NSDateComponentsFormatter output styles.
NSDateComponentsFormatterZeroFormattingBehavior	Enumerates how zero values should be dealt with by a NSDateComponentsFormatter.
NSDateComponentsWrappingBehavior	An enumeration that allows the application developer to specify whether calendar components should be wrapped.
NSDateFormatterBehavior	An enumeration that can specify whether the NSDateFormatter should behave as it did prior to OS x v10.4
NSDateFormatterStyle	An enumeration of values that specify different date-format styles.
NSDateIntervalFormatterStyle	Enumerates the output styles of a NSDateIntervalFormatter.
NSDecodingFailurePolicy	Enumerates the manner in which a NSCoder fails. (See P:Foundation.NSCoder.FailurePolicy)
NSDirectoryEnumerationOptions	An enumeration of options for use with NSDirectoryEnumerator.
NSDocumentType	An enumeration of known document types. Used with the DocumentType property.
NSDocumentViewMode	An enumeration that specifies how a document is being viewed. Used with the ViewMode property.
NSEnergyFormatterUnit	The unit to be used by a NSEnergyFormatter.
NSEnumerationOptions	An enumeration of valid options for use when enumerating over Blocks.
NSExpressionType	An enumeration of valid types for a NSExpression.
NSFileCoordinatorReadingOptions	An enumeration of options relating to reading the contents or attributes of a file or directory.
NSFileCoordinatorWritingOptions	An enumeration of options valid when changing the contents or attributes of a file or directory.
NSFileManagerItemReplacementOptions	An enumeration of options for use with Replace(NSUrl, NSUrl, String, NSFileManagerItemReplacementOptions, NSUrl, NSError).
NSFileProtection	Enumerates file protection levels.
NSFileType	File kind enumeration.
NSFileVersionAddingOptions	Allows the application developer to specify that a new file version should be created by moving the source file.
NSFileVersionReplacingOptions	Allows the application developer to specify that the old version of the file should be removed from the version store.
NSFileWrapperReadingOptions	An enumeration of options to be used when reading a file-system node.
NSFileWrapperWritingOptions	An enumeration of options to be used when writing a file-system node.
NSFormattingContext	Enumerates the position of the data being formatted. Used with NSByteCountFormatter and NSDateComponentsFormatter.
NSFormattingUnitStyle	Enumerates the style (desired length) of an NSLengthFormatter, NSEnergyFormatter, or NSMassFormatter.
NSHttpCookieAcceptPolicy	An enumeration whose values specify valid strategies for accepting NSHttpCookies.
NSIso8601DateFormatOptions	A flagging enumeration of formatting options for use with NSIso8601DateFormatter.
NSItemDownloadingStatus	Enumerates download status values.
NSItemProviderErrorCode	Enumerates errors relating to NSItemProvider methods.
NSItemProviderFileOptions
NSItemProviderRepresentationVisibility
NSJsonReadingOptions	Options for use when converting JSON data to instances of Foundation types.
NSJsonWritingOptions	An enumeration specifying printing options (compact vs. pretty-printed) for JSON data.
NSKeyValueChange	An enumeration indicating the type of change occurring in the WillChangeValue(String) and DidChangeValue(String) methods.
NSKeyValueObservingOptions	An enumeration of values specifying options to be used with the AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) method.
NSKeyValueSetMutationKind	An enumeration of values indicating the operation being performed on a mutable key-value store.
NSLengthFormatterUnit	Enumerates units of length (foot, meter, etc.) for use with NSLengthFormatter.
NSLigatureType	An enumeration that defines the valid ligature types of an NSAttributedString.
NSLinguisticTaggerOptions	An enumeration of options for use with NSLinguisticTagger.
NSLinguisticTaggerUnit	Enumerate the linguistic units recognized by the NSLinguisticTagger class.
NSLinguisticTagScheme	Enumerates classes of tags that are returned from a text classifier.
NSLinguisticTagUnit	Enumerates tag values for linguistic units.
NSLocaleLanguageDirection	An enumeration of values that specify the direction of text for a language.
NSMachPortRights	A flagging enumeration whose values specify options in calls to FromMachPort(UInt32, NSMachPortRights).
NSMassFormatterUnit	Enumerates mass units (lb, kg, stone).
NSMatchingFlags	Enumerates flags for use with the NSMatchEnumerator delegate.
NSMatchingOptions	Enumerates options for use with NSRegularExpression regular expression objects.
NSMeasurementFormatterUnitOptions
NSNetServiceOptions	NSNetService options.
NSNetServicesStatus	Status codes for the NSNetService.
NSNotificationCoalescing	An enumeration of ways in which NSNotifications can be coalesced.
NSNumberFormatterBehavior	An enumeration whose values specify whether the number formatter should behave as it did before OS X v10.4
NSNumberFormatterPadPosition	An enumeration whose values indicates where padding should be applied to numbers.
NSNumberFormatterRoundingMode	An enumeration of rounding modes that can be applied to numbers.
NSNumberFormatterStyle	An enumeration of formats that can be used with numbers.
NSOperationQueuePriority	An enumeration of values that specify the priority of an operation, relative to others, in a NSOperationQueue.
NSPersonNameComponentsFormatterOptions	Contains a constant that, if specified, indicates that the phonetic representation of a name should be formatted, rather than the name object's own components.
NSPersonNameComponentsFormatterStyle	Enumerates values that control the way that names are displayed.
NSPostingStyle	An enumeration of values that specify when a notification shouldbe posted.
NSPredicateOperatorType	An enumeration of values that specify comparison types for use with NSComparisonPredicate.
NSProcessInfoThermalState
NSPropertyListFormat	The format to use during serialization using NSKeyedArchiver.
NSPropertyListMutabilityOptions	An enumeration of values specifying mutability options for property lists.
NSPropertyListReadOptions	Apple states that functionality related to this class is not implemented.
NSPropertyListWriteOptions	An enumeration of mutability options for use with property lists.
NSQualityOfService	Enumerates QoS values for use with NSOperation objects and NSOperationQueue objects.
NSRegularExpressionOptions	Defines options for use with NSRegularExpression objects.
NSRoundingMode	An enumeration of values that specify rounding behaviors for NSDecimals.
NSRunLoopMode	Run loop modes for NSRunLoop.
NSSearchPathDirectory	An enumeration of special directories for use with M:Foundation.NSFileManager.GetURLs*.
NSSearchPathDomain	An enumeration of values specifying search path domain constants for use with NSSearchPathDirectory.
NSSortOptions	A flagging enumeration that specifies sorting options in calls to M:NSFoundation.NSMutableOrderedSet.Sort*.
NSStreamEvent	An enumeration of values that may be sent to HandleEvent(NSStream, NSStreamEvent).
NSStreamServiceType	Possible values for the service type for an NSStream.
NSStreamSocketSecurityLevel	The security protocol to use for an NSStream.
NSStreamStatus	The current status of an NSStream.
NSStringCompareOptions	An enumeration of options available to NSString search and comparison methods.
NSStringDrawingOptions	An enumeration of options for use when drawing strings.
NSStringEncoding	Encodings supported by NSString.Encode.
NSStringTransform
NSTextCheckingType	Enumerates available predefined regular expressions for checking text.
NSTextCheckingTypes	Enumerates available predefined classes of regular expressions for checking text.
NSTextWritingDirection	Enumerates writing directions for use with NSWritingDirection.
NSTimeZoneNameStyle	Specifies styles for time-zone names.
NSUbiquitousKeyValueStoreChangeReason	An enumeration of valid reasons for modifying the iCloud ubiquitous key store.
NSUnderlineStyle	An enumeration of valid styles for underlines or strikethroughs.
NSUrlBookmarkCreationOptions	An enumeration of options ot be used when creating a bookmark.
NSUrlBookmarkResolutionOptions	An enumeration of options to be used when creating an NSUrl by resolving a bookmark.
NSUrlCacheStoragePolicy	An enumeration of values representing valid caching strategies for use with NSUrls.
NSUrlCredentialPersistence	Determines how credentials are persisted.
NSUrlError	An enumeration of errors associated with creating or loading a NSUrl.
NSUrlErrorCancelledReason	An enumeration whose values specify why a data transfer was cancelled.
NSUrlRelationship	Defines constants defining the relationship between a directory and an item.
NSUrlRequestCachePolicy	NSUrlRequest caching policy.
NSUrlRequestNetworkServiceType	Network service types for NSUrlRequest.
NSUrlSessionAuthChallengeDisposition	An enumeration whose values specify the state of an authorization challenge.
NSUrlSessionDelayedRequestDisposition
NSUrlSessionMultipathServiceType
NSUrlSessionResponseDisposition	An enumeration whose values specify the state of a response.
NSUrlSessionTaskMetricsResourceFetchType	Enumerates the way a network resource might be loaded.
NSUrlSessionTaskState	An enumeration whose values specify the state of a T:Foundation.NSSessionTask.
NSUserDefaultsType	An enumeration whose values specify the type of a T:NSFoundation.NSUserDefaults object.
NSVolumeEnumerationOptions	An enumeration of options for use when enumerating mounted volumes.
NSWritingDirection	An enumeration of valid writing directions.

Delegates

EnumerateDatesCallback	Completion handler for the EnumerateDatesStartingAfterDate(NSDate, NSDateComponents, NSCalendarOptions, EnumerateDatesCallback) method.
EnumerateIndexSetCallback	Defines the enumerator callback in calls to EnumerateIndexes(NSRange, NSEnumerationOptions, EnumerateIndexSetCallback).
ItemProviderDataCompletionHandler
LinguisticTagEnumerator
LoadInPlaceFileRepresentationHandler
NSAttributedRangeCallback	A delegate that specifies the callback for the EnumerateAttributes(NSRange, NSAttributedStringEnumeration, NSAttributedRangeCallback) method.
NSAttributedStringCallback	A delegate that specifies the callback for the EnumerateAttribute(NSString, NSRange, NSAttributedStringEnumeration, NSAttributedStringCallback) method.
NSComparator	A delegate that defines the comparison function to be used with functins such as Sort(NSComparator).
NSDataByteRangeEnumerator	The delegate used to enumerate in calls to EnumerateByteRange(NSDataByteRangeEnumerator).
NSDecoderCallback	A delegate that specifies the callback function for the DecodedObject property.
NSDecoderHandler	A delegate that specifies the callback function for the CannotDecodeClass property.
NSEncodeHook	A delegate that specifies the function to be called by the WillEncode method.
NSEnumerateErrorHandler	A delegate that specifies the error handler for use in GetEnumerator(NSUrl, NSString[], NSDirectoryEnumerationOptions, NSEnumerateErrorHandler).
NSEnumerateLinguisticTagsEnumerator	An enumerator to pass to methods in the NSLinguisticAnalysis class.
NSErrorUserInfoValueProvider	Delegate returned by GetUserInfoValueProvider(String).
NSExpressionCallbackHandler
NSExpressionHandler	A delegate that specifies the target of the FromFunction(NSExpression, String, NSExpression[]) method.
NSFileCoordinatorWorkerRW	A delegate that used with a number of coordinated read-and-write functions in NSFileCoordinator.
NSFilePresenterReacquirer	Completion handler for relinquishing a file to a reader.
NSFileVersionNonlocalVersionsCompletionHandler
NSItemProviderCompletionHandler	The completion handler used with NSItemProviderLoadHandler delegates.
NSItemProviderLoadHandler	Defines the load handler for use with the RegisterItemForTypeIdentifier(String, NSItemProviderLoadHandler) and SetPreviewImageHandler(NSItemProviderLoadHandler) methods.
NSLingusticEnumerator	A delegate that enumerates values for EnumerateTagsInRange(NSRange, NSString, NSLinguisticTaggerOptions, NSLingusticEnumerator).
NSMatchEnumerator	Delegate applied to results in EnumerateMatches(NSString, NSMatchingOptions, NSRange, NSMatchEnumerator).
NSMetadataQueryEnumerationCallback	The delegate used as the callback in calls to EnumerateResultsUsingBlock(NSMetadataQueryEnumerationCallback) and EnumerateResultsWithOptions(NSEnumerationOptions, NSMetadataQueryEnumerationCallback).
NSMetadataQueryObject	A delegate that defines the value for ReplacementObjectForResultObject.
NSMetadataQueryValue	A delegate that defines the value for ReplacementValueForAttributevalue.
NSPredicateEvaluator	A delegate that represents the expression to use with FromExpression(NSPredicateEvaluator).
NSRangeIterator	A delegate used to specify the iterator used by EnumerateRanges(NSRange, NSEnumerationOptions, NSRangeIterator).
NSSetEnumerator	A delegate that specifies the enumerator used by Enumerate(NSSetEnumerator).
NSUrlConnectionDataResponse	The delegate used as the completion handler for SendAsynchronousRequest(NSUrlRequest, NSOperationQueue, NSUrlConnectionDataResponse).
NSUrlDownloadSessionResponse	Completion handler for calls to M:Foundation.NSUrlSession.CreateDownloadTask* and CreateDownloadTaskFromResumeData(NSData, NSUrlDownloadSessionResponse).
NSUrlSessionAllPendingTasks
NSUrlSessionDataRead
NSUrlSessionPendingTasks	The delegate that serves as the completion handler for GetTasks(NSUrlSessionPendingTasks).
NSUrlSessionPendingTasks2	Contains pending tasks for an NSUrlSession.
NSUrlSessionResponse	Signature for callbacks invoked by NSUrlSession for various background operations.
RegisterDataRepresentationLoadHandler
RegisterFileRepresentationCompletionHandler
RegisterFileRepresentationLoadHandler
RegisterObjectRepresentationCompletionHandler
RegisterObjectRepresentationLoadHandler

Remarks

MonoTouch bindings are largely built on the Objective-C extension to the Mono runtime that allows seamless integration between Objective-C and C# objects. This namespace provides bindings to Apple's Foundation framework.