TypeIdentifierAttribute TypeIdentifierAttribute TypeIdentifierAttribute TypeIdentifierAttribute Class

Definition

Provides support for type equivalence.

public ref class TypeIdentifierAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Delegate, AllowMultiple=false, Inherited=false)]
[System.Runtime.InteropServices.ComVisible(false)]
[System.AttributeUsage(System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Struct, AllowMultiple=false, Inherited=false)]
public sealed class TypeIdentifierAttribute : Attribute
type TypeIdentifierAttribute = class
    inherit Attribute
Public NotInheritable Class TypeIdentifierAttribute
Inherits Attribute
Inheritance
TypeIdentifierAttributeTypeIdentifierAttributeTypeIdentifierAttributeTypeIdentifierAttribute
Attributes

Remarks

The TypeIdentifierAttribute attribute is primarily emitted by compilers. It serves two purposes:

  • For all imported types, it indicates that the type is intended to be used for type equivalence.

  • For types that don’t have GUIDs in their type library, it has a constructor that takes two strings (scope and identifier). These are combined into a GUID and become the key that is used for type equivalence.

Type equivalence is discussed in the Type.IsEquivalentTo topic.

Constructors

TypeIdentifierAttribute() TypeIdentifierAttribute() TypeIdentifierAttribute() TypeIdentifierAttribute()

Creates a new instance of the TypeIdentifierAttribute class.

TypeIdentifierAttribute(String, String) TypeIdentifierAttribute(String, String) TypeIdentifierAttribute(String, String) TypeIdentifierAttribute(String, String)

Creates a new instance of the TypeIdentifierAttribute class with the specified scope and identifier.

Properties

Identifier Identifier Identifier Identifier

Gets the value of the identifier parameter that was passed to the TypeIdentifierAttribute(String, String) constructor.

Scope Scope Scope Scope

Gets the value of the scope parameter that was passed to the TypeIdentifierAttribute(String, String) constructor.

TypeId TypeId TypeId TypeId

When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)

Methods

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Returns a value that indicates whether this instance is equal to a specified object.

(Inherited from Attribute)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Returns the hash code for this instance.

(Inherited from Attribute)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute()

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(Inherited from Attribute)
Match(Object) Match(Object) Match(Object) Match(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(Inherited from Attribute)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

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

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

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

(Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32)

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

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

Applies to

See Also