.NET Framework Class Library
CustomConstantAttribute Class

Defines a constant value that a compiler can persist for a field or method parameter.

Namespace:   System.Runtime.CompilerServices
Assembly:  mscorlib (in mscorlib.dll)
Syntax
<[%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_0%]> _
<[%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_1%](True)> _
<[%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_2%]([%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_3%].Field Or [%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_4%].Parameter, Inherited := False)> _
Public MustInherit Class CustomConstantAttribute _
	Inherits [%$TOPIC/67acskyc_en-us_VS_110_2_0_0_0_5%]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_0%]]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_1%](true)]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_2%]([%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_3%].Field|[%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_4%].Parameter, Inherited = false)]
public abstract class CustomConstantAttribute : [%$TOPIC/67acskyc_en-us_VS_110_2_0_1_0_5%]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_0%]]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_1%](true)]
[[%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_2%]([%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_3%]::Field|[%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_4%]::Parameter, Inherited = false)]
public ref class CustomConstantAttribute abstract : public [%$TOPIC/67acskyc_en-us_VS_110_2_0_2_0_5%]
[<[%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_0%]>]
[<[%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_1%]>]
[<[%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_2%](true)>]
[<[%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_3%]([%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_4%].Field|[%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_5%].Parameter, Inherited = false)>]
type CustomConstantAttribute =  
    class 
        inherit [%$TOPIC/67acskyc_en-us_VS_110_2_0_3_0_6%] 
    end

The CustomConstantAttribute type exposes the following members.

Constructors
  NameDescription
Protected method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps CustomConstantAttributeInitializes a new instance of the CustomConstantAttribute class.
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Properties
  NameDescription
Public property TypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
Public property Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ValueGets the constant value stored by this attribute.
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Methods
  NameDescription
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps EqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps FinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps GetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps GetTypeGets the Type of the current instance. (Inherited from Object.)
Public method IsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public method Supported by the XNA Framework MatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps MemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ToStringReturns a string that represents the current object. (Inherited from Object.)
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Explicit Interface Implementations
  NameDescription
Explicit interface implemetation Private method _AttributeGetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeGetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetation Private method _AttributeInvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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Remarks

You can apply this attribute to fields or parameters.

This class cannot be instantiated.

Compilers should create specific classes, derived from this class, that define the type of the constant value. For example, see the DateTimeConstantAttribute, which allows a compiler to persist an 8-byte DateTime constant for a field or method parameter. If you are using System.Reflection, this pattern of deriving specific classes from CustomConstantAttribute enables you to find all occurrences of custom constant attributes easily.

The classes in System.Runtime.CompilerServices are for compiler writers' use only.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
Platforms

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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