System Namespace

The System namespace contains fundamental classes and base classes that define commonly-used value and reference data types, events and event handlers, interfaces, attributes, and processing exceptions.

Classes

AccessViolationException

The exception that is thrown when there is an attempt to read or write protected memory.

ActivationContext

Identifies the activation context for the current application. This class cannot be inherited.

Activator

Contains methods to create types of objects locally or remotely, or obtain references to existing remote objects. This class cannot be inherited.

AggregateException

Represents one or more errors that occur during application execution.

AppContext

Provides members for setting and retrieving data about an application's context.

AppDomain

Represents an application domain, which is an isolated environment where applications execute. This class cannot be inherited.

AppDomainManager

Provides a managed equivalent of an unmanaged host.

AppDomainSetup

Represents assembly binding information that can be added to an instance of AppDomain.

AppDomainUnloadedException

The exception that is thrown when an attempt is made to access an unloaded application domain.

ApplicationException

Serves as the base class for application-defined exceptions.

ApplicationId

Contains information used to uniquely identify a manifest-based application. This class cannot be inherited.

ApplicationIdentity

Provides the ability to uniquely identify a manifest-activated application. This class cannot be inherited.

ArgumentException

The exception that is thrown when one of the arguments provided to a method is not valid.

ArgumentNullException

The exception that is thrown when a null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

ArgumentOutOfRangeException

The exception that is thrown when the value of an argument is outside the allowable range of values as defined by the invoked method.

ArithmeticException

The exception that is thrown for errors in an arithmetic, casting, or conversion operation.

Array

Provides methods for creating, manipulating, searching, and sorting arrays, thereby serving as the base class for all arrays in the common language runtime.

ArrayTypeMismatchException

The exception that is thrown when an attempt is made to store an element of the wrong type within an array.

AssemblyLoadEventArgs

Provides data for the AssemblyLoad event.

Attribute

Represents the base class for custom attributes.

AttributeUsageAttribute

Specifies the usage of another attribute class. This class cannot be inherited.

BadImageFormatException

The exception that is thrown when the file image of a dynamic link library (DLL) or an executable program is invalid.

BitConverter

Converts base data types to an array of bytes, and an array of bytes to base data types.

Buffer

Manipulates arrays of primitive types.

CannotUnloadAppDomainException

The exception that is thrown when an attempt to unload an application domain fails.

CharEnumerator

Supports iterating over a String object and reading its individual characters. This class cannot be inherited.

CLSCompliantAttribute

Indicates whether a program element is compliant with the Common Language Specification (CLS). This class cannot be inherited.

Console

Represents the standard input, output, and error streams for console applications. This class cannot be inherited.

ConsoleCancelEventArgs

Provides data for the CancelKeyPress event. This class cannot be inherited.

ContextBoundObject

Defines the base class for all context-bound classes.

ContextMarshalException

The exception that is thrown when an attempt to marshal an object across a context boundary fails.

ContextStaticAttribute

Indicates that the value of a static field is unique for a particular context.

Convert

Converts a base data type to another base data type.

DataMisalignedException

The exception that is thrown when a unit of data is read from or written to an address that is not a multiple of the data size. This class cannot be inherited.

DBNull

Represents a nonexistent value. This class cannot be inherited.

Delegate

Represents a delegate, which is a data structure that refers to a static method or to a class instance and an instance method of that class.

DivideByZeroException

The exception that is thrown when there is an attempt to divide an integral or Decimal value by zero.

DllNotFoundException

The exception that is thrown when a DLL specified in a DLL import cannot be found.

DuplicateWaitObjectException

The exception that is thrown when an object appears more than once in an array of synchronization objects.

EntryPointNotFoundException

The exception that is thrown when an attempt to load a class fails due to the absence of an entry method.

Enum

Provides the base class for enumerations.

Environment

Provides information about, and means to manipulate, the current environment and platform. This class cannot be inherited.

EventArgs

Represents the base class for classes that contain event data, and provides a value to use for events that do not include event data.

Exception

Represents errors that occur during application execution.

ExecutionEngineException

The exception that is thrown when there is an internal error in the execution engine of the common language runtime. This class cannot be inherited.

FieldAccessException

The exception that is thrown when there is an invalid attempt to access a private or protected field inside a class.

FileStyleUriParser

A customizable parser based on the File scheme.

FlagsAttribute

Indicates that an enumeration can be treated as a bit field; that is, a set of flags.

FormatException

The exception that is thrown when the format of an argument is invalid, or when a composite format string is not well formed.

FormattableString

Represents a composite format string, along with the arguments to be formatted.

FtpStyleUriParser

A customizable parser based on the File Transfer Protocol (FTP) scheme.

GC

Controls the system garbage collector, a service that automatically reclaims unused memory.

GenericUriParser

A customizable parser for a hierarchical URI.

GopherStyleUriParser

A customizable parser based on the Gopher scheme.

HttpStyleUriParser

A customizable parser based on the HTTP scheme.

IndexOutOfRangeException

The exception that is thrown when an attempt is made to access an element of an array or collection with an index that is outside its bounds.

InsufficientExecutionStackException

The exception that is thrown when there is insufficient execution stack available to allow most methods to execute.

InsufficientMemoryException

The exception that is thrown when a check for sufficient available memory fails. This class cannot be inherited.

InvalidCastException

The exception that is thrown for invalid casting or explicit conversion.

InvalidOperationException

The exception that is thrown when a method call is invalid for the object's current state.

InvalidProgramException

The exception that is thrown when a program contains invalid Microsoft intermediate language (MSIL) or metadata. Generally this indicates a bug in the compiler that generated the program.

InvalidTimeZoneException

The exception that is thrown when time zone information is invalid.

Lazy<T>

Provides support for lazy initialization.

Lazy<T,TMetadata>

Provides a lazy indirect reference to an object and its associated metadata for use by the Managed Extensibility Framework.

LdapStyleUriParser

A customizable parser based on the Lightweight Directory Access Protocol (LDAP) scheme.

LoaderOptimizationAttribute

Used to set the default loader optimization policy for the main method of an executable application.

LocalDataStoreSlot

Encapsulates a memory slot to store local data. This class cannot be inherited.

MarshalByRefObject

Enables access to objects across application domain boundaries in applications that support remoting.

Math

Provides constants and static methods for trigonometric, logarithmic, and other common mathematical functions.

MathF
MemberAccessException

The exception that is thrown when an attempt to access a class member fails.

MethodAccessException

The exception that is thrown when there is an invalid attempt to access a method, such as accessing a private method from partially trusted code.

MissingFieldException

The exception that is thrown when there is an attempt to dynamically access a field that does not exist. If a field in a class library has been removed or renamed, recompile any assemblies that reference that library.

MissingMemberException

The exception that is thrown when there is an attempt to dynamically access a class member that does not exist or that is not declared as public. If a member in a class library has been removed or renamed, recompile any assemblies that reference that library.

MissingMethodException

The exception that is thrown when there is an attempt to dynamically access a method that does not exist.

MTAThreadAttribute

Indicates that the COM threading model for an application is multithreaded apartment (MTA).

MulticastDelegate

Represents a multicast delegate; that is, a delegate that can have more than one element in its invocation list.

MulticastNotSupportedException

The exception that is thrown when there is an attempt to combine two delegates based on the Delegate type instead of the MulticastDelegate type. This class cannot be inherited.

NetPipeStyleUriParser

A parser based on the NetPipe scheme for the "Indigo" system.

NetTcpStyleUriParser

A parser based on the NetTcp scheme for the "Indigo" system.

NewsStyleUriParser

A customizable parser based on the news scheme using the Network News Transfer Protocol (NNTP).

NonSerializedAttribute

Indicates that a field of a serializable class should not be serialized. This class cannot be inherited.

NotFiniteNumberException

The exception that is thrown when a floating-point value is positive infinity, negative infinity, or Not-a-Number (NaN).

NotImplementedException

The exception that is thrown when a requested method or operation is not implemented.

NotSupportedException

The exception that is thrown when an invoked method is not supported, or when there is an attempt to read, seek, or write to a stream that does not support the invoked functionality.

Nullable

Supports a value type that can be assigned null. This class cannot be inherited.

NullReferenceException

The exception that is thrown when there is an attempt to dereference a null object reference.

Object

Supports all classes in the .NET Framework class hierarchy and provides low-level services to derived classes. This is the ultimate base class of all classes in the .NET Framework; it is the root of the type hierarchy.

ObjectDisposedException

The exception that is thrown when an operation is performed on a disposed object.

ObsoleteAttribute

Marks the program elements that are no longer in use. This class cannot be inherited.

OperatingSystem

Represents information about an operating system, such as the version and platform identifier. This class cannot be inherited.

OperationCanceledException

The exception that is thrown in a thread upon cancellation of an operation that the thread was executing.

OutOfMemoryException

The exception that is thrown when there is not enough memory to continue the execution of a program.

OverflowException

The exception that is thrown when an arithmetic, casting, or conversion operation in a checked context results in an overflow.

ParamArrayAttribute

Indicates that a method will allow a variable number of arguments in its invocation. This class cannot be inherited.

PlatformNotSupportedException

The exception that is thrown when a feature does not run on a particular platform.

Progress<T>

Provides an IProgress<T> that invokes callbacks for each reported progress value.

Random

Represents a pseudo-random number generator, which is a device that produces a sequence of numbers that meet certain statistical requirements for randomness.

RankException

The exception that is thrown when an array with the wrong number of dimensions is passed to a method.

ResolveEventArgs

Provides data for loader resolution events, such as the TypeResolve, ResourceResolve, ReflectionOnlyAssemblyResolve, and AssemblyResolve events.

SerializableAttribute

Indicates that a class can be serialized. This class cannot be inherited.

SpanExtensions
StackOverflowException

The exception that is thrown when the execution stack overflows because it contains too many nested method calls. This class cannot be inherited.

STAThreadAttribute

Indicates that the COM threading model for an application is single-threaded apartment (STA).

String

Represents text as a sequence of UTF-16 code units.

StringComparer

Represents a string comparison operation that uses specific case and culture-based or ordinal comparison rules.

StringNormalizationExtensions

Provides extension methods to work with string normalization.

SystemException

Serves as the base class for system exceptions namespace.

ThreadStaticAttribute

Indicates that the value of a static field is unique for each thread.

TimeoutException

The exception that is thrown when the time allotted for a process or operation has expired.

TimeZone

Represents a time zone.

TimeZoneInfo

Represents any time zone in the world.

TimeZoneInfo.AdjustmentRule

Provides information about a time zone adjustment, such as the transition to and from daylight saving time.

TimeZoneNotFoundException

The exception that is thrown when a time zone cannot be found.

Tuple

Provides static methods for creating tuple objects.

Tuple<T1>

Represents a 1-tuple, or singleton.

Tuple<T1,T2>

Represents a 2-tuple, or pair.

Tuple<T1,T2,T3>

Represents a 3-tuple, or triple.

Tuple<T1,T2,T3,T4>

Represents a 4-tuple, or quadruple.

Tuple<T1,T2,T3,T4,T5>

Represents a 5-tuple, or quintuple.

Tuple<T1,T2,T3,T4,T5,T6>

Represents a 6-tuple, or sextuple.

Tuple<T1,T2,T3,T4,T5,T6,T7>

Represents a 7-tuple, or septuple.

Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>

Represents an n-tuple, where n is 8 or greater.

TupleExtensions

Provides extension methods for tuples to interoperate with language support for tuples in C#.

Type

Represents type declarations: class types, interface types, array types, value types, enumeration types, type parameters, generic type definitions, and open or closed constructed generic types.

TypeAccessException

The exception that is thrown when a method attempts to use a type that it does not have access to.

TypeInitializationException

The exception that is thrown as a wrapper around the exception thrown by the class initializer. This class cannot be inherited.

TypeLoadException

The exception that is thrown when type-loading failures occur.

TypeUnloadedException

The exception that is thrown when there is an attempt to access an unloaded class.

UnauthorizedAccessException

The exception that is thrown when the operating system denies access because of an I/O error or a specific type of security error.

UnhandledExceptionEventArgs

Provides data for the event that is raised when there is an exception that is not handled in any application domain.

Uri

Provides an object representation of a uniform resource identifier (URI) and easy access to the parts of the URI.

UriBuilder

Provides a custom constructor for uniform resource identifiers (URIs) and modifies URIs for the Uri class.

UriFormatException

The exception that is thrown when an invalid Uniform Resource Identifier (URI) is detected.

UriParser

Parses a new URI scheme. This is an abstract class.

UriTemplate

A class that represents a Uniform Resource Identifier (URI) template.

UriTemplateEquivalenceComparer

A class used to compare UriTemplate instances for structural (instead of reference) equivalence.

UriTemplateMatch

A class that represents the results of a match operation on a UriTemplate instance.

UriTemplateMatchException

Represents an error when matching a Uri to a UriTemplateTable.

UriTemplateTable

A class that represents an associative set of UriTemplate objects.

UriTypeConverter

Converts a String type to a Uri type, and vice versa.

ValueType

Provides the base class for value types.

Version

Represents the version number of an assembly, operating system, or the common language runtime. This class cannot be inherited.

WeakReference

Represents a weak reference, which references an object while still allowing that object to be reclaimed by garbage collection.

WeakReference<T>

Represents a typed weak reference, which references an object while still allowing that object to be reclaimed by garbage collection.

Structs

ArgIterator

Represents a variable-length argument list; that is, the parameters of a function that takes a variable number of arguments.

ArraySegment<T>.Enumerator
ArraySegment<T>

Delimits a section of a one-dimensional array.

Boolean

Represents a Boolean (true or false) value.

Byte

Represents an 8-bit unsigned integer.

Char

Represents a character as a UTF-16 code unit.

ConsoleKeyInfo

Describes the console key that was pressed, including the character represented by the console key and the state of the SHIFT, ALT, and CTRL modifier keys.

DateTime

Represents an instant in time, typically expressed as a date and time of day.

DateTimeOffset

Represents a point in time, typically expressed as a date and time of day, relative to Coordinated Universal Time (UTC).

Decimal

Represents a decimal number.

Double

Represents a double-precision floating-point number.

Guid

Represents a globally unique identifier (GUID).

Int16

Represents a 16-bit signed integer.

Int32

Represents a 32-bit signed integer.

Int64

Represents a 64-bit signed integer.

IntPtr

A platform-specific type that is used to represent a pointer or a handle.

ModuleHandle

Represents a runtime handle for a module.

Nullable<T>

Represents a value type that can be assigned null.

ReadOnlySpan<T>
RuntimeArgumentHandle

References a variable-length argument list.

RuntimeFieldHandle

Represents a field using an internal metadata token.

RuntimeMethodHandle

RuntimeMethodHandle is a handle to the internal metadata representation of a method.

RuntimeTypeHandle

Represents a type using an internal metadata token.

SByte

Represents an 8-bit signed integer.

Single

Represents a single-precision floating-point number.

Span<T>
TimeSpan

Represents a time interval.

TimeZoneInfo.TransitionTime

Provides information about a specific time change, such as the change from daylight saving time to standard time or vice versa, in a particular time zone.

TypedReference

Describes objects that contain both a managed pointer to a location and a runtime representation of the type that may be stored at that location.

UInt16

Represents a 16-bit unsigned integer.

UInt32

Represents a 32-bit unsigned integer.

UInt64

Represents a 64-bit unsigned integer.

UIntPtr

A platform-specific type that is used to represent a pointer or a handle.

ValueTuple

Provides static methods for creating value tuples.

ValueTuple<T1>

Represents a value tuple with a single component.

ValueTuple<T1,T2>

Represents a value tuple with 2 components.

ValueTuple<T1,T2,T3>

Represents a value tuple with 3 components.

ValueTuple<T1,T2,T3,T4>

Represents a value tuple with 4 components.

ValueTuple<T1,T2,T3,T4,T5>

Represents a value tuple with 5 components.

ValueTuple<T1,T2,T3,T4,T5,T6>

Represents a value tuple with 6 components.

ValueTuple<T1,T2,T3,T4,T5,T6,T7>

Represents a value tuple with 7 components.

ValueTuple<T1,T2,T3,T4,T5,T6,T7,TRest>

Represents an n-value tuple, where n is 8 or greater.

Void

Specifies a return value type for a method that does not return a value.

Interfaces

_AppDomain

Exposes the public members of the AppDomain class to unmanaged code.

IAppDomainSetup

Represents assembly binding information that can be added to an instance of AppDomain.

IAsyncResult

Represents the status of an asynchronous operation.

ICloneable

Supports cloning, which creates a new instance of a class with the same value as an existing instance.

IComparable

Defines a generalized type-specific comparison method that a value type or class implements to order or sort its instances.

IComparable<T>

Defines a generalized comparison method that a value type or class implements to create a type-specific comparison method for ordering or sorting its instances.

IConvertible

Defines methods that convert the value of the implementing reference or value type to a common language runtime type that has an equivalent value.

ICustomFormatter

Defines a method that supports custom formatting of the value of an object.

IDisposable

Provides a mechanism for releasing unmanaged resources.

IEquatable<T>

Defines a generalized method that a value type or class implements to create a type-specific method for determining equality of instances.

IFormatProvider

Provides a mechanism for retrieving an object to control formatting.

IFormattable

Provides functionality to format the value of an object into a string representation.

IObservable<T>

Defines a provider for push-based notification.

IObserver<T>

Provides a mechanism for receiving push-based notifications.

IProgress<T>

Defines a provider for progress updates.

IServiceProvider

Defines a mechanism for retrieving a service object; that is, an object that provides custom support to other objects.

Enums

ActivationContext.ContextForm

Indicates the context for a manifest-activated application.

AppDomainManagerInitializationOptions

Specifies the action that a custom application domain manager takes when initializing a new domain.

AttributeTargets

Specifies the application elements on which it is valid to apply an attribute.

Base64FormattingOptions

Specifies whether relevant ToBase64CharArray and ToBase64String methods insert line breaks in their output.

ConsoleColor

Specifies constants that define foreground and background colors for the console.

ConsoleKey

Specifies the standard keys on a console.

ConsoleModifiers

Represents the SHIFT, ALT, and CTRL modifier keys on a keyboard.

ConsoleSpecialKey

Specifies combinations of modifier and console keys that can interrupt the current process.

DateTimeKind

Specifies whether a DateTime object represents a local time, a Coordinated Universal Time (UTC), or is not specified as either local time or UTC.

DayOfWeek

Specifies the day of the week.

Environment.SpecialFolder

Specifies enumerated constants used to retrieve directory paths to system special folders.

Environment.SpecialFolderOption

Specifies options to use for getting the path to a special folder.

EnvironmentVariableTarget

Specifies the location where an environment variable is stored or retrieved in a set or get operation.

GCCollectionMode

Specifies the behavior for a forced garbage collection.

GCNotificationStatus

Provides information about the current registration for notification of the next full garbage collection.

GenericUriParserOptions

Specifies options for a UriParser.

LoaderOptimization

An enumeration used with the LoaderOptimizationAttribute class to specify loader optimizations for an executable.

MidpointRounding

Specifies how mathematical rounding methods should process a number that is midway between two numbers.

PlatformID

Identifies the operating system, or platform, supported by an assembly.

StringComparison

Specifies the culture, case, and sort rules to be used by certain overloads of the Compare(String, String) and Equals(Object) methods.

StringSplitOptions

Specifies whether applicable Split method overloads include or omit empty substrings from the return value.

TypeCode

Specifies the type of an object.

UriComponents

Specifies the parts of a Uri.

UriFormat

Controls how URI information is escaped.

UriHostNameType

Defines host name types for the CheckHostName(String) method.

UriIdnScope

Provides the possible values for the configuration setting of the IdnElement in the System.Configuration namespace.

UriKind

Defines the kinds of Uris for the IsWellFormedUriString(String, UriKind) and several System.Uri. methods.

UriPartial

Defines the parts of a URI for the GetLeftPart(UriPartial) method.

Delegates

Action

Encapsulates a method that has no parameters and does not return a value.

Action<T>

Encapsulates a method that has a single parameter and does not return a value.

Action<T1,T2>

Encapsulates a method that has two parameters and does not return a value.

Action<T1,T2,T3>

Encapsulates a method that has three parameters and does not return a value.

Action<T1,T2,T3,T4>

Encapsulates a method that has four parameters and does not return a value.

Action<T1,T2,T3,T4,T5>

Encapsulates a method that has five parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6>

Encapsulates a method that has six parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7>

Encapsulates a method that has seven parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8>

Encapsulates a method that has eight parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9>

Encapsulates a method that has nine parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>

Encapsulates a method that has 10 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>

Encapsulates a method that has 11 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>

Encapsulates a method that has 12 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13>

Encapsulates a method that has 13 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14>

Encapsulates a method that has 14 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15>

Encapsulates a method that has 15 parameters and does not return a value.

Action<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16>

Encapsulates a method that has 16 parameters and does not return a value.

AppDomainInitializer

Represents the callback method to invoke when the application domain is initialized.

AssemblyLoadEventHandler

Represents the method that handles the AssemblyLoad event of an AppDomain.

AsyncCallback

References a method to be called when a corresponding asynchronous operation completes.

Comparison<T>

Represents the method that compares two objects of the same type.

ConsoleCancelEventHandler

Represents the method that will handle the CancelKeyPress event of a Console.

Converter<TInput,TOutput>

Represents a method that converts an object from one type to another type.

CrossAppDomainDelegate

Used by DoCallBack(CrossAppDomainDelegate) for cross-application domain calls.

EventHandler

Represents the method that will handle an event that has no event data.

EventHandler<TEventArgs>

Represents the method that will handle an event when the event provides data.

Func<TResult>

Encapsulates a method that has no parameters and returns a value of the type specified by the TResult parameter.

Func<T,TResult>

Encapsulates a method that has one parameter and returns a value of the type specified by the TResult parameter.

Func<T1,T2,TResult>

Encapsulates a method that has two parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,TResult>

Encapsulates a method that has three parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,TResult>

Encapsulates a method that has four parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,TResult>

Encapsulates a method that has five parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,TResult>

Encapsulates a method that has six parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,TResult>

Encapsulates a method that has seven parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,TResult>

Encapsulates a method that has eight parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,TResult>

Encapsulates a method that has nine parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,TResult>

Encapsulates a method that has 10 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,TResult>

Encapsulates a method that has 11 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,TResult>

Encapsulates a method that has 12 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,TResult>

Encapsulates a method that has 13 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,TResult>

Encapsulates a method that has 14 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,TResult>

Encapsulates a method that has 15 parameters and returns a value of the type specified by the TResult parameter.

Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,TResult>

Encapsulates a method that has 16 parameters and returns a value of the type specified by the TResult parameter.

Predicate<T>

Represents the method that defines a set of criteria and determines whether the specified object meets those criteria.

ResolveEventHandler

Represents a method that handles the TypeResolve, ResourceResolve, or AssemblyResolve event of an AppDomain.

UnhandledExceptionEventHandler

Represents the method that will handle the event raised by an exception that is not handled by the application domain.

Remarks

Other classes provide services supporting data type conversion, method parameter manipulation, mathematics, remote and local program invocation, application environment management, and supervision of managed and unmanaged applications.

To access types in the System namespace from C# code without having to provide fully qualified type names, include the using System; statement at the beginning of your source code file.

To access types in the System namespace from C++/CLI code without having to provide fully qualified type names, include the using namespace System; statement at the beginning of your source code file. In addition, you must compile with the /clr switch.