TypeIdentifierAttribute Class

.NET Framework (current version)
 

Provides support for type equivalence.

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

System.Object
  System.Attribute
    System.Runtime.InteropServices.TypeIdentifierAttribute

[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Interface | AttributeTargets.Delegate,
    AllowMultiple = false, Inherited = false)>]
[<ComVisibleAttribute(false)>]
type TypeIdentifierAttribute = 
    class
        inherit Attribute
    end

NameDescription
System_CAPS_pubmethodTypeIdentifierAttribute()

Creates a new instance of the TypeIdentifierAttribute class.

System_CAPS_pubmethodTypeIdentifierAttribute(String, String)

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

NameDescription
System_CAPS_pubpropertyIdentifier

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

System_CAPS_pubpropertyScope

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

System_CAPS_pubpropertyTypeId

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

NameDescription
System_CAPS_pubmethodEquals(Object)

This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodGetHashCode()

Returns the hash code for this instance.(Inherited from Attribute.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsDefaultAttribute()

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)

System_CAPS_pubmethodMatch(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

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

System_CAPS_pubinterfaceSystem_CAPS_privmethod_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.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfoCount(UInt32)

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

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

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

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.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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