PureAttribute Class
 

Indicates that a type or method is pure, that is, it does not make any visible state changes.

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

Inheritance Hierarchy
SystemObject
   SystemAttribute
    System.Diagnostics.ContractsPureAttribute

Syntax
[ConditionalAttribute("CONTRACTS_FULL")]
[AttributeUsageAttribute(AttributeTargets.Class | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.Delegate, 
	AllowMultiple = false, Inherited = true)]
public sealed class PureAttribute : Attribute
[ConditionalAttribute("CONTRACTS_FULL")]
[AttributeUsageAttribute(AttributeTargets::Class | AttributeTargets::Constructor | AttributeTargets::Method | AttributeTargets::Property | AttributeTargets::Event | AttributeTargets::Parameter | AttributeTargets::Delegate, 
	AllowMultiple = false, Inherited = true)]
public ref class PureAttribute sealed : Attribute
[<Sealed>]
[<ConditionalAttribute("CONTRACTS_FULL")>]
[<AttributeUsageAttribute(AttributeTargets.Class | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.Delegate,
    AllowMultiple = false, Inherited = true)>]
type PureAttribute = 
    class
        inherit Attribute
    end
<ConditionalAttribute("CONTRACTS_FULL")>
<AttributeUsageAttribute(AttributeTargets.Class Or AttributeTargets.Constructor Or AttributeTargets.Method Or AttributeTargets.Property Or AttributeTargets.Event Or AttributeTargets.Parameter Or AttributeTargets.Delegate,
	AllowMultiple := False, Inherited := True)>
Public NotInheritable Class PureAttribute
	Inherits Attribute
Constructors
NameDescription
System_CAPS_pubmethod PureAttribute

Initializes a new instance of the PureAttribute class.

Properties
NameDescription
System_CAPS_pubproperty

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

Methods
NameDescription
System_CAPS_pubmethod Equals

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_pubmethod GetHashCode

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

System_CAPS_pubmethod GetType

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

System_CAPS_pubmethod 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.)

System_CAPS_pubmethod Match

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

System_CAPS_pubmethod ToString

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

Explicit Interface Implementations
NameDescription
System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetIDsOfNames

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

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfo

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

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfoCount

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

System_CAPS_pubinterface System_CAPS_privmethod _AttributeInvoke

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

Remarks

Methods and types that are marked with this attribute can be used in calls to System.Diagnostics.ContractsContract methods. Pure methods do not make any visible state changes. This attribute is not enforced by the current analysis tools; you should use this attribute only if you are sure that the methods are pure.

Version Information
Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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.

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