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Type Class

 

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.

To browse the .NET Framework source code for this type, see the Reference Source.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)


<SerializableAttribute>
<ClassInterfaceAttribute(ClassInterfaceType.None)>
<ComVisibleAttribute(True)>
Public MustInherit Class Type
	Inherits MemberInfo
	Implements _Type, IReflect
Name Description
System_CAPS_protmethod Type()

Initializes a new instance of the Type class.

Name Description
System_CAPS_pubproperty Assembly

Gets the Assembly in which the type is declared. For generic types, gets the Assembly in which the generic type is defined.

System_CAPS_pubproperty AssemblyQualifiedName

Gets the assembly-qualified name of the type, which includes the name of the assembly from which this Typeobject was loaded.

System_CAPS_pubproperty Attributes

Gets the attributes associated with the Type.

System_CAPS_pubproperty BaseType

Gets the type from which the current Type directly inherits.

System_CAPS_pubproperty ContainsGenericParameters

Gets a value indicating whether the current Type object has type parameters that have not been replaced by specific types.

System_CAPS_pubproperty CustomAttributes

Gets a collection that contains this member's custom attributes.(Inherited from MemberInfo.)

System_CAPS_pubproperty DeclaringMethod

Gets a MethodBase that represents the declaring method, if the current Type represents a type parameter of a generic method.

System_CAPS_pubproperty DeclaringType

Gets the type that declares the current nested type or generic type parameter.(Overrides MemberInfo.DeclaringType.)

System_CAPS_pubproperty System_CAPS_static DefaultBinder

Gets a reference to the default binder, which implements internal rules for selecting the appropriate members to be called by InvokeMember.

System_CAPS_pubproperty FullName

Gets the fully qualified name of the type, including its namespace but not its assembly.

System_CAPS_pubproperty GenericParameterAttributes

Gets a combination of GenericParameterAttributes flags that describe the covariance and special constraints of the current generic type parameter.

System_CAPS_pubproperty GenericParameterPosition

Gets the position of the type parameter in the type parameter list of the generic type or method that declared the parameter, when the Type object represents a type parameter of a generic type or a generic method.

System_CAPS_pubproperty GenericTypeArguments

Gets an array of the generic type arguments for this type.

System_CAPS_pubproperty GUID

Gets the GUID associated with the Type.

System_CAPS_pubproperty HasElementType

Gets a value indicating whether the current Type encompasses or refers to another type; that is, whether the current Type is an array, a pointer, or is passed by reference.

System_CAPS_pubproperty IsAbstract

Gets a value indicating whether the Type is abstract and must be overridden.

System_CAPS_pubproperty IsAnsiClass

Gets a value indicating whether the string format attribute AnsiClass is selected for the Type.

System_CAPS_pubproperty IsArray

Gets a value that indicates whether the type is an array.

System_CAPS_pubproperty IsAutoClass

Gets a value indicating whether the string format attribute AutoClass is selected for the Type.

System_CAPS_pubproperty IsAutoLayout

Gets a value indicating whether the fields of the current type are laid out automatically by the common language runtime.

System_CAPS_pubproperty IsByRef

Gets a value indicating whether the Type is passed by reference.

System_CAPS_pubproperty IsClass

Gets a value indicating whether the Type is a class or a delegate; that is, not a value type or interface.

System_CAPS_pubproperty IsCOMObject

Gets a value indicating whether the Type is a COM object.

System_CAPS_pubproperty IsConstructedGenericType

Gets a value that indicates whether this object represents a constructed generic type.You can create instances of a constructed generic type.

System_CAPS_pubproperty IsContextful

Gets a value indicating whether the Type can be hosted in a context.

System_CAPS_pubproperty IsEnum

Gets a value indicating whether the current Type represents an enumeration.

System_CAPS_pubproperty IsExplicitLayout

Gets a value indicating whether the fields of the current type are laid out at explicitly specified offsets.

System_CAPS_pubproperty IsGenericParameter

Gets a value indicating whether the current Type represents a type parameter in the definition of a generic type or method.

System_CAPS_pubproperty IsGenericType

Gets a value indicating whether the current type is a generic type.

System_CAPS_pubproperty IsGenericTypeDefinition

Gets a value indicating whether the current Type represents a generic type definition, from which other generic types can be constructed.

System_CAPS_pubproperty IsImport

Gets a value indicating whether the Type has a ComImportAttribute attribute applied, indicating that it was imported from a COM type library.

System_CAPS_pubproperty IsInterface

Gets a value indicating whether the Type is an interface; that is, not a class or a value type.

System_CAPS_pubproperty IsLayoutSequential

Gets a value indicating whether the fields of the current type are laid out sequentially, in the order that they were defined or emitted to the metadata.

System_CAPS_pubproperty IsMarshalByRef

Gets a value indicating whether the Type is marshaled by reference.

System_CAPS_pubproperty IsNested

Gets a value indicating whether the current Type object represents a type whose definition is nested inside the definition of another type.

System_CAPS_pubproperty IsNestedAssembly

Gets a value indicating whether the Type is nested and visible only within its own assembly.

System_CAPS_pubproperty IsNestedFamANDAssem

Gets a value indicating whether the Type is nested and visible only to classes that belong to both its own family and its own assembly.

System_CAPS_pubproperty IsNestedFamily

Gets a value indicating whether the Type is nested and visible only within its own family.

System_CAPS_pubproperty IsNestedFamORAssem

Gets a value indicating whether the Type is nested and visible only to classes that belong to either its own family or to its own assembly.

System_CAPS_pubproperty IsNestedPrivate

Gets a value indicating whether the Type is nested and declared private.

System_CAPS_pubproperty IsNestedPublic

Gets a value indicating whether a class is nested and declared public.

System_CAPS_pubproperty IsNotPublic

Gets a value indicating whether the Type is not declared public.

System_CAPS_pubproperty IsPointer

Gets a value indicating whether the Type is a pointer.

System_CAPS_pubproperty IsPrimitive

Gets a value indicating whether the Type is one of the primitive types.

System_CAPS_pubproperty IsPublic

Gets a value indicating whether the Type is declared public.

System_CAPS_pubproperty IsSealed

Gets a value indicating whether the Type is declared sealed.

System_CAPS_pubproperty IsSecurityCritical

Gets a value that indicates whether the current type is security-critical or security-safe-critical at the current trust level, and therefore can perform critical operations.

System_CAPS_pubproperty IsSecuritySafeCritical

Gets a value that indicates whether the current type is security-safe-critical at the current trust level; that is, whether it can perform critical operations and can be accessed by transparent code.

System_CAPS_pubproperty IsSecurityTransparent

Gets a value that indicates whether the current type is transparent at the current trust level, and therefore cannot perform critical operations.

System_CAPS_pubproperty IsSerializable

Gets a value indicating whether the Type is serializable.

System_CAPS_pubproperty IsSpecialName

Gets a value indicating whether the type has a name that requires special handling.

System_CAPS_pubproperty IsUnicodeClass

Gets a value indicating whether the string format attribute UnicodeClass is selected for the Type.

System_CAPS_pubproperty IsValueType

Gets a value indicating whether the Type is a value type.

System_CAPS_pubproperty IsVisible

Gets a value indicating whether the Type can be accessed by code outside the assembly.

System_CAPS_pubproperty MemberType

Gets a MemberTypes value indicating that this member is a type or a nested type.(Overrides MemberInfo.MemberType.)

System_CAPS_pubproperty MetadataToken

Gets a value that identifies a metadata element.(Inherited from MemberInfo.)

System_CAPS_pubproperty Module

Gets the module (the DLL) in which the current Type is defined.

System_CAPS_pubproperty Name

Gets the name of the current member.(Inherited from MemberInfo.)

System_CAPS_pubproperty Namespace

Gets the namespace of the Type.

System_CAPS_pubproperty ReflectedType

Gets the class object that was used to obtain this member. (Overrides MemberInfo.ReflectedType.)

System_CAPS_pubproperty StructLayoutAttribute

Gets a StructLayoutAttribute that describes the layout of the current type.

System_CAPS_pubproperty TypeHandle

Gets the handle for the current Type.

System_CAPS_pubproperty TypeInitializer

Gets the initializer for the type.

System_CAPS_pubproperty UnderlyingSystemType

Indicates the type provided by the common language runtime that represents this type.

Name Description
System_CAPS_pubmethod Equals(Object)

Determines if the underlying system type of the current Type object is the same as the underlying system type of the specified Object.(Overrides MemberInfo.Equals(Object).)

System_CAPS_pubmethod Equals(Type)

Determines if the underlying system type of the current Type is the same as the underlying system type of the specified Type.

System_CAPS_protmethod Finalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethod FindInterfaces(TypeFilter, Object)

Returns an array of Type objects representing a filtered list of interfaces implemented or inherited by the current Type.

System_CAPS_pubmethod FindMembers(MemberTypes, BindingFlags, MemberFilter, Object)

Returns a filtered array of MemberInfo objects of the specified member type.

System_CAPS_pubmethod GetArrayRank()

Gets the number of dimensions in an array.

System_CAPS_protmethod GetAttributeFlagsImpl()

When overridden in a derived class, implements the Attributes property and gets a bitmask indicating the attributes associated with the Type.

System_CAPS_pubmethod GetConstructor(BindingFlags, Binder, CallingConventions, Type[], ParameterModifier[])

Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention.

System_CAPS_pubmethod GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[])

Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints.

System_CAPS_pubmethod GetConstructor(Type[])

Searches for a public instance constructor whose parameters match the types in the specified array.

System_CAPS_protmethod GetConstructorImpl(BindingFlags, Binder, CallingConventions, Type[], ParameterModifier[])

When overridden in a derived class, searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention.

System_CAPS_pubmethod GetConstructors()

Returns all the public constructors defined for the current Type.

System_CAPS_pubmethod GetConstructors(BindingFlags)

When overridden in a derived class, searches for the constructors defined for the current Type, using the specified BindingFlags.

System_CAPS_pubmethod GetCustomAttributes(Boolean)

When overridden in a derived class, returns an array of all custom attributes applied to this member. (Inherited from MemberInfo.)

System_CAPS_pubmethod GetCustomAttributes(Type, Boolean)

When overridden in a derived class, returns an array of custom attributes applied to this member and identified by Type.(Inherited from MemberInfo.)

System_CAPS_pubmethod GetCustomAttributesData()

Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target member.(Inherited from MemberInfo.)

System_CAPS_pubmethod GetDefaultMembers()

Searches for the members defined for the current Type whose DefaultMemberAttribute is set.

System_CAPS_pubmethod GetElementType()

When overridden in a derived class, returns the Type of the object encompassed or referred to by the current array, pointer or reference type.

System_CAPS_pubmethod GetEnumName(Object)

Returns the name of the constant that has the specified value, for the current enumeration type.

System_CAPS_pubmethod GetEnumNames()

Returns the names of the members of the current enumeration type.

System_CAPS_pubmethod GetEnumUnderlyingType()

Returns the underlying type of the current enumeration type.

System_CAPS_pubmethod GetEnumValues()

Returns an array of the values of the constants in the current enumeration type.

System_CAPS_pubmethod GetEvent(String)

Returns the EventInfo object representing the specified public event.

System_CAPS_pubmethod GetEvent(String, BindingFlags)

When overridden in a derived class, returns the EventInfo object representing the specified event, using the specified binding constraints.

System_CAPS_pubmethod GetEvents()

Returns all the public events that are declared or inherited by the current Type.

System_CAPS_pubmethod GetEvents(BindingFlags)

When overridden in a derived class, searches for events that are declared or inherited by the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetField(String)

Searches for the public field with the specified name.

System_CAPS_pubmethod GetField(String, BindingFlags)

Searches for the specified field, using the specified binding constraints.

System_CAPS_pubmethod GetFields()

Returns all the public fields of the current Type.

System_CAPS_pubmethod GetFields(BindingFlags)

When overridden in a derived class, searches for the fields defined for the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetGenericArguments()

Returns an array of Type objects that represent the type arguments of a closed generic type or the type parameters of a generic type definition.

System_CAPS_pubmethod GetGenericParameterConstraints()

Returns an array of Type objects that represent the constraints on the current generic type parameter.

System_CAPS_pubmethod GetGenericTypeDefinition()

Returns a Type object that represents a generic type definition from which the current generic type can be constructed.

System_CAPS_pubmethod GetHashCode()

Returns the hash code for this instance.(Overrides MemberInfo.GetHashCode().)

System_CAPS_pubmethod GetInterface(String)

Searches for the interface with the specified name.

System_CAPS_pubmethod GetInterface(String, Boolean)

When overridden in a derived class, searches for the specified interface, specifying whether to do a case-insensitive search for the interface name.

System_CAPS_pubmethod GetInterfaceMap(Type)

Returns an interface mapping for the specified interface type.

System_CAPS_pubmethod GetInterfaces()

When overridden in a derived class, gets all the interfaces implemented or inherited by the current Type.

System_CAPS_pubmethod GetMember(String)

Searches for the public members with the specified name.

System_CAPS_pubmethod GetMember(String, BindingFlags)

Searches for the specified members, using the specified binding constraints.

System_CAPS_pubmethod GetMember(String, MemberTypes, BindingFlags)

Searches for the specified members of the specified member type, using the specified binding constraints.

System_CAPS_pubmethod GetMembers()

Returns all the public members of the current Type.

System_CAPS_pubmethod GetMembers(BindingFlags)

When overridden in a derived class, searches for the members defined for the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetMethod(String)

Searches for the public method with the specified name.

System_CAPS_pubmethod GetMethod(String, BindingFlags)

Searches for the specified method, using the specified binding constraints.

System_CAPS_pubmethod GetMethod(String, BindingFlags, Binder, CallingConventions, Type[], ParameterModifier[])

Searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention.

System_CAPS_pubmethod GetMethod(String, BindingFlags, Binder, Type[], ParameterModifier[])

Searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints.

System_CAPS_pubmethod GetMethod(String, Type[])

Searches for the specified public method whose parameters match the specified argument types.

System_CAPS_pubmethod GetMethod(String, Type[], ParameterModifier[])

Searches for the specified public method whose parameters match the specified argument types and modifiers.

System_CAPS_protmethod GetMethodImpl(String, BindingFlags, Binder, CallingConventions, Type[], ParameterModifier[])

When overridden in a derived class, searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention.

System_CAPS_pubmethod GetMethods()

Returns all the public methods of the current Type.

System_CAPS_pubmethod GetMethods(BindingFlags)

When overridden in a derived class, searches for the methods defined for the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetNestedType(String)

Searches for the public nested type with the specified name.

System_CAPS_pubmethod GetNestedType(String, BindingFlags)

When overridden in a derived class, searches for the specified nested type, using the specified binding constraints.

System_CAPS_pubmethod GetNestedTypes()

Returns the public types nested in the current Type.

System_CAPS_pubmethod GetNestedTypes(BindingFlags)

When overridden in a derived class, searches for the types nested in the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetProperties()

Returns all the public properties of the current Type.

System_CAPS_pubmethod GetProperties(BindingFlags)

When overridden in a derived class, searches for the properties of the current Type, using the specified binding constraints.

System_CAPS_pubmethod GetProperty(String)

Searches for the public property with the specified name.

System_CAPS_pubmethod GetProperty(String, BindingFlags)

Searches for the specified property, using the specified binding constraints.

System_CAPS_pubmethod GetProperty(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])

Searches for the specified property whose parameters match the specified argument types and modifiers, using the specified binding constraints.

System_CAPS_pubmethod GetProperty(String, Type)

Searches for the public property with the specified name and return type.

System_CAPS_pubmethod GetProperty(String, Type, Type[])

Searches for the specified public property whose parameters match the specified argument types.

System_CAPS_pubmethod GetProperty(String, Type, Type[], ParameterModifier[])

Searches for the specified public property whose parameters match the specified argument types and modifiers.

System_CAPS_pubmethod GetProperty(String, Type[])

Searches for the specified public property whose parameters match the specified argument types.

System_CAPS_protmethod GetPropertyImpl(String, BindingFlags, Binder, Type, Type[], ParameterModifier[])

When overridden in a derived class, searches for the specified property whose parameters match the specified argument types and modifiers, using the specified binding constraints.

System_CAPS_pubmethod GetType()

Gets the current Type.

System_CAPS_pubmethod System_CAPS_static GetType(String)

Gets the Type with the specified name, performing a case-sensitive search.

System_CAPS_pubmethod System_CAPS_static GetType(String, Boolean)

Gets the Type with the specified name, performing a case-sensitive search and specifying whether to throw an exception if the type is not found.

System_CAPS_pubmethod System_CAPS_static GetType(String, Boolean, Boolean)

Gets the Type with the specified name, specifying whether to throw an exception if the type is not found and whether to perform a case-sensitive search.

System_CAPS_pubmethod System_CAPS_static GetType(String, Func<AssemblyName, Assembly>, Func<Assembly, String, Boolean, Type>)

Gets the type with the specified name, optionally providing custom methods to resolve the assembly and the type.

System_CAPS_pubmethod System_CAPS_static GetType(String, Func<AssemblyName, Assembly>, Func<Assembly, String, Boolean, Type>, Boolean)

Gets the type with the specified name, specifying whether to throw an exception if the type is not found, and optionally providing custom methods to resolve the assembly and the type.

System_CAPS_pubmethod System_CAPS_static GetType(String, Func<AssemblyName, Assembly>, Func<Assembly, String, Boolean, Type>, Boolean, Boolean)

Gets the type with the specified name, specifying whether to perform a case-sensitive search and whether to throw an exception if the type is not found, and optionally providing custom methods to resolve the assembly and the type.

System_CAPS_pubmethod System_CAPS_static GetTypeArray(Object[])

Gets the types of the objects in the specified array.

System_CAPS_pubmethod System_CAPS_static GetTypeCode(Type)

Gets the underlying type code of the specified Type.

System_CAPS_protmethod GetTypeCodeImpl()

Returns the underlying type code of this Type instance.

System_CAPS_pubmethod System_CAPS_static GetTypeFromCLSID(Guid)

Gets the type associated with the specified class identifier (CLSID).

System_CAPS_pubmethod System_CAPS_static GetTypeFromCLSID(Guid, Boolean)

Gets the type associated with the specified class identifier (CLSID), specifying whether to throw an exception if an error occurs while loading the type.

System_CAPS_pubmethod System_CAPS_static GetTypeFromCLSID(Guid, String)

Gets the type associated with the specified class identifier (CLSID) from the specified server.

System_CAPS_pubmethod System_CAPS_static GetTypeFromCLSID(Guid, String, Boolean)

Gets the type associated with the specified class identifier (CLSID) from the specified server, specifying whether to throw an exception if an error occurs while loading the type.

System_CAPS_pubmethod System_CAPS_static GetTypeFromHandle(RuntimeTypeHandle)

Gets the type referenced by the specified type handle.

System_CAPS_pubmethod System_CAPS_static GetTypeFromProgID(String)

Gets the type associated with the specified program identifier (ProgID), returning null if an error is encountered while loading the Type.

System_CAPS_pubmethod System_CAPS_static GetTypeFromProgID(String, Boolean)

Gets the type associated with the specified program identifier (ProgID), specifying whether to throw an exception if an error occurs while loading the type.

System_CAPS_pubmethod System_CAPS_static GetTypeFromProgID(String, String)

Gets the type associated with the specified program identifier (progID) from the specified server, returning null if an error is encountered while loading the type.

System_CAPS_pubmethod System_CAPS_static GetTypeFromProgID(String, String, Boolean)

Gets the type associated with the specified program identifier (progID) from the specified server, specifying whether to throw an exception if an error occurs while loading the type.

System_CAPS_pubmethod System_CAPS_static GetTypeHandle(Object)

Gets the handle for the Type of a specified object.

System_CAPS_protmethod HasElementTypeImpl()

When overridden in a derived class, implements the HasElementType property and determines whether the current Type encompasses or refers to another type; that is, whether the current Type is an array, a pointer, or is passed by reference.

System_CAPS_pubmethod InvokeMember(String, BindingFlags, Binder, Object, Object[])

Invokes the specified member, using the specified binding constraints and matching the specified argument list.

System_CAPS_pubmethod InvokeMember(String, BindingFlags, Binder, Object, Object[], CultureInfo)

Invokes the specified member, using the specified binding constraints and matching the specified argument list and culture.

System_CAPS_pubmethod InvokeMember(String, BindingFlags, Binder, Object, Object[], ParameterModifier[], CultureInfo, String[])

When overridden in a derived class, invokes the specified member, using the specified binding constraints and matching the specified argument list, modifiers and culture.

System_CAPS_protmethod IsArrayImpl()

When overridden in a derived class, implements the IsArray property and determines whether the Type is an array.

System_CAPS_pubmethod IsAssignableFrom(Type)

Determines whether an instance of a specified type can be assigned to an instance of the current type.

System_CAPS_protmethod IsByRefImpl()

When overridden in a derived class, implements the IsByRef property and determines whether the Type is passed by reference.

System_CAPS_protmethod IsCOMObjectImpl()

When overridden in a derived class, implements the IsCOMObject property and determines whether the Type is a COM object.

System_CAPS_protmethod IsContextfulImpl()

Implements the IsContextful property and determines whether the Type can be hosted in a context.

System_CAPS_pubmethod IsDefined(Type, Boolean)

When overridden in a derived class, indicates whether one or more attributes of the specified type or of its derived types is applied to this member.(Inherited from MemberInfo.)

System_CAPS_pubmethod IsEnumDefined(Object)

Returns a value that indicates whether the specified value exists in the current enumeration type.

System_CAPS_pubmethod IsEquivalentTo(Type)

Determines whether two COM types have the same identity and are eligible for type equivalence.

System_CAPS_pubmethod IsInstanceOfType(Object)

Determines whether the specified object is an instance of the current Type.

System_CAPS_protmethod IsMarshalByRefImpl()

Implements the IsMarshalByRef property and determines whether the Type is marshaled by reference.

System_CAPS_protmethod IsPointerImpl()

When overridden in a derived class, implements the IsPointer property and determines whether the Type is a pointer.

System_CAPS_protmethod IsPrimitiveImpl()

When overridden in a derived class, implements the IsPrimitive property and determines whether the Type is one of the primitive types.

System_CAPS_pubmethod IsSubclassOf(Type)

Determines whether the current Type derives from the specified Type.

System_CAPS_protmethod IsValueTypeImpl()

Implements the IsValueType property and determines whether the Type is a value type; that is, not a class or an interface.

System_CAPS_pubmethod MakeArrayType()

Returns a Type object representing a one-dimensional array of the current type, with a lower bound of zero.

System_CAPS_pubmethod MakeArrayType(Int32)

Returns a Type object representing an array of the current type, with the specified number of dimensions.

System_CAPS_pubmethod MakeByRefType()

Returns a Type object that represents the current type when passed as a ref parameter (ByRef parameter in Visual Basic).

System_CAPS_pubmethod MakeGenericType(Type[])

Substitutes the elements of an array of types for the type parameters of the current generic type definition and returns a Type object representing the resulting constructed type.

System_CAPS_pubmethod MakePointerType()

Returns a Type object that represents a pointer to the current type.

System_CAPS_protmethod MemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethod System_CAPS_static ReflectionOnlyGetType(String, Boolean, Boolean)

Gets the Type with the specified name, specifying whether to perform a case-sensitive search and whether to throw an exception if the type is not found. The type is loaded for reflection only, not for execution.

System_CAPS_pubmethod ToString()

Returns a String representing the name of the current Type.(Overrides Object.ToString().)

Name Description
System_CAPS_pubfield System_CAPS_static Delimiter

Separates names in the namespace of the Type. This field is read-only.

System_CAPS_pubfield System_CAPS_static EmptyTypes

Represents an empty array of type Type. This field is read-only.

System_CAPS_pubfield System_CAPS_static FilterAttribute

Represents the member filter used on attributes. This field is read-only.

System_CAPS_pubfield System_CAPS_static FilterName

Represents the case-sensitive member filter used on names. This field is read-only.

System_CAPS_pubfield System_CAPS_static FilterNameIgnoreCase

Represents the case-insensitive member filter used on names. This field is read-only.

System_CAPS_pubfield System_CAPS_static Missing

Represents a missing value in the Type information. This field is read-only.

Name Description
System_CAPS_puboperator System_CAPS_static Equality(Type, Type)

Indicates whether two Type objects are equal.

System_CAPS_puboperator System_CAPS_static Inequality(Type, Type)

Indicates whether two Type objects are not equal.

Name Description
System_CAPS_pubinterface System_CAPS_privmethod _MemberInfo.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from MemberInfo.)

System_CAPS_pubinterface System_CAPS_privmethod _MemberInfo.GetType()

Gets a Type object representing the MemberInfo class.(Inherited from MemberInfo.)

System_CAPS_pubinterface System_CAPS_privmethod _MemberInfo.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can then be used to get the type information for an interface.(Inherited from MemberInfo.)

System_CAPS_pubinterface System_CAPS_privmethod _MemberInfo.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from MemberInfo.)

System_CAPS_pubinterface System_CAPS_privmethod _MemberInfo.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from MemberInfo.)

System_CAPS_pubinterface System_CAPS_privmethod _Type.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.

System_CAPS_pubinterface System_CAPS_privmethod _Type.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can then be used to get the type information for an interface.

System_CAPS_pubinterface System_CAPS_privmethod _Type.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

System_CAPS_pubinterface System_CAPS_privmethod _Type.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

Name Description
System_CAPS_pubmethod GetCustomAttribute(Type)

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttribute(Type, Boolean)

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member, and optionally inspects the ancestors of that member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttribute<T>()

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttribute<T>(Boolean)

Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified member, and optionally inspects the ancestors of that member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttributes()

Overloaded. Retrieves a collection of custom attributes that are applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttributes(Type)

Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetCustomAttributes<T>(Boolean)

Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified member, and optionally inspects the ancestors of that member.(Defined by CustomAttributeExtensions.)

System_CAPS_pubmethod GetRuntimeEvent(String)

Retrieves an object that represents the specified event.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeEvents()

Retrieves a collection that represents all the events defined on a specified type.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeField(String)

Retrieves an object that represents a specified field.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeFields()

Retrieves a collection that represents all the fields defined on a specified type.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeMethod(String, Type[])

Retrieves an object that represents a specified method.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeMethods()

Retrieves a collection that represents all methods defined on a specified type.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeProperties()

Retrieves a collection that represents all the properties defined on a specified type.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetRuntimeProperty(String)

Retrieves an object that represents a specified property.(Defined by RuntimeReflectionExtensions.)

System_CAPS_pubmethod GetTypeInfo()

Returns the TypeInfo representation of the specified type.(Defined by IntrospectionExtensions.)

System_CAPS_pubmethod IsDefined(Type)

Overloaded. Indicates whether custom attributes of a specified type are applied to a specified member.(Defined by CustomAttributeExtensions.)

System_CAPS_note Note

To view the .NET Framework source code for this type, see the Reference Source. You can browse through the source code online, download the reference for offline viewing, and step through the sources (including patches and updates) during debugging; see instructions.

Type is the root of the System.Reflection functionality and is the primary way to access metadata. Use the members of Type to get information about a type declaration, about the members of a type (such as the constructors, methods, fields, properties, and events of a class), as well as the module and the assembly in which the class is deployed.

No permissions are required for code to use reflection to get information about types and their members, regardless of their access levels. No permissions are required for code to use reflection to access public members, or other members whose access levels would make them visible during normal compilation. However, in order for your code to use reflection to access members that would normally be inaccessible, such as private or internal methods, or protected fields of a type your class does not inherit, your code must have ReflectionPermission. See Security Considerations for Reflection.

Type is an abstract base class that allows multiple implementations. The system will always provide the derived class RuntimeType. In reflection, all classes beginning with the word Runtime are created only once per object in the system and support comparison operations.

System_CAPS_note Note

In multithreading scenarios, do not lock Type objects in order to synchronize access to static data. Other code, over which you have no control, might also lock your class type. This might result in a deadlock. Instead, synchronize access to static data by locking a private static object.

System_CAPS_note Note

A derived class can access protected members of the calling code's base classes. Also, access is allowed to assembly members of the calling code's assembly. As a rule, if you are allowed access in early-bound code, then you are also allowed access in late-bound code.

System_CAPS_note Note

Interfaces that extend other interfaces do not inherit the methods defined in the extended interfaces.

In this section:

What types does a Type object represent?
Retrieving a Type object
Comparing type objects for equality

This class is thread safe; multiple threads can concurrently read from an instance of this type. An instance of the Type class can represent any of the following types:

  • Classes

  • Value types

  • Arrays

  • Interfaces

  • Enumerations

  • Delegates

  • Constructed generic types and generic type definitions

  • Type arguments and type parameters of constructed generic types, generic type definitions, and generic method definitions

The Type object associated with a particular type can be obtained in the following ways:

  • The instance Object.GetType method returns a Type object that represents the type of an instance. Because all managed types derive from Object, the GetType method can be called on an instance of any type.

    The following example calls the Object.GetType method to determine the runtime type of each object in an object array.

    Module Example
       Public Sub Main()
          Dim values() As Object = { "word", True, 120, 136.34, "a"c }
          For Each value In values
             Console.WriteLine("{0} - type {1}", value, 
                               value.GetType().Name)
          Next
       End Sub
    End Module
    ' The example displays the following output:
    '       word - type String
    '       True - type Boolean
    '       120 - type Int32
    '       136.34 - type Double
    '       a - type Char
    
  • The static Type.GetType methods return a Type object that represents a type specified by its fully qualified name.

  • The Module.GetTypes, Module.GetType, and Module.FindTypes methods return Type objects that represent the types defined in a module. The first method can be used to obtain an array of Type objects for all the public and private types defined in a module. (You can obtain an instance of Module through the Assembly.GetModule or Assembly.GetModules method, or through the Type.Module property.)

  • The System.Reflection.Assembly object contains a number of methods to retrieve the classes defined in an assembly, including Assembly.GetType, Assembly.GetTypes, and Assembly.GetExportedTypes.

  • The FindInterfaces method returns a filtered list of interface types supported by a type.

  • The GetElementType method returns a Type object that represents the element.

  • The GetInterfaces and GetInterface methods return Type objects representing the interface types supported by a type.

  • The GetTypeArray method returns an array of Type objects representing the types specified by an arbitrary set of objects. The objects are specified with an array of type Object.

  • The GetTypeFromProgID and GetTypeFromCLSID methods are provided for COM interoperability. They return a Type object that represents the type specified by a ProgID or CLSID.

  • The GetTypeFromHandle method is provided for interoperability. It returns a Type object that represents the type specified by a class handle.

  • The C# typeof operator, the C++ typeid operator, and the Visual Basic GetType operator obtain the Type object for a type.

  • The MakeGenericType method returns a Type object representing a constructed generic type, which is an open constructed type if its ContainsGenericParameters property returns true, and a closed constructed type otherwise. A generic type can be instantiated only if it is closed.

  • The MakeArrayType, MakePointerType, and MakeByRefType methods return Type objects that represent, respectively, an array of a specified type, a pointer to a specified type, and the type of a reference parameter (ref in C#, ByRef in Visual Basic).

A Type object that represents a type is unique; that is, two Type object references refer to the same object if and only if they represent the same type. This allows for comparison of Type objects using reference equality. The following example compares the Type objects that represent a number of integer values to determine whether they are of the same type.

Module Example
   Public Sub Main()
      Dim number1 As Long = 1635429
      Dim number2 As Integer = 16203
      Dim number3 As Double = 1639.41
      Dim number4 As Long = 193685412

      ' Get the type of number1.
      Dim t As Type = number1.GetType()

      ' Compare types of all objects with number1.
      Console.WriteLine("Type of number1 and number2 are equal: {0}",
                        Object.ReferenceEquals(t, number2.GetType()))
      Console.WriteLine("Type of number1 and number3 are equal: {0}",
                        Object.ReferenceEquals(t, number3.GetType()))
      Console.WriteLine("Type of number1 and number4 are equal: {0}",
                        Object.ReferenceEquals(t, number4.GetType()))
   End Sub
End Module
' The example displays the following output:
'       Type of number1 and number2 are equal: False
'       Type of number1 and number3 are equal: False
'       Type of number1 and number4 are equal: True

The following example shows a few representative features of Type. The C# typeof operator (GetType operator in Visual Basic, typeid operator in Visual C++) is used to get a Type object representing String. From this Type object, the GetMethod method is used to get a MethodInfo representing the Substring overload that takes a starting location and a length.

To identify the overload signature, the code example creates a temporary array containing two Type objects representing int (Integer in Visual Basic).

System_CAPS_note Note

To be precise, the array contains two references to the instance of Type that represents int in the current application domain. For any type, there is only one instance of Type per application domain.

The code example uses the MethodInfo to invoke the Substring method on the string "Hello, World!", and displays the result.

Imports System
Imports System.Reflection

Module Example

    Sub Main() 

        Dim t As Type = GetType(String)

        Dim substr As MethodInfo = t.GetMethod("Substring", _
            New Type() { GetType(Integer), GetType(Integer) })

        Dim result As Object = _ 
            substr.Invoke("Hello, World!", New Object() { 7, 5 })
        Console.WriteLine("{0} returned ""{1}"".", substr, result)

    End Sub 
End Module

' This code example produces the following output:
'
'System.String Substring(Int32, Int32) returned "World".
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

This type is thread safe.

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