Article
11/18/2011

PureAttribute Class

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

Inheritance Hierarchy

System.Object
System.Attribute
System.Diagnostics.Contracts.PureAttribute

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

Syntax

'Declaration
<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

[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

The PureAttribute type exposes the following members.

Constructors

	Name	Description
	PureAttribute	Initializes a new instance of the PureAttribute class.

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Methods

	Name	Description
	Equals	Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Returns the hash code for this instance. (Inherited from Attribute.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Match	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

Methods and types that are marked with this attribute can be used in calls to System.Diagnostics.Contracts.Contract 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

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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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