OptionalAttribute Class
Microsoft Silverlight will reach end of support after October 2021. Learn more.
This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
Indicates that a parameter is optional.
Inheritance Hierarchy
System.Object
System.Attribute
System.Runtime.InteropServices.OptionalAttribute
Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<ComVisibleAttribute(True)> _
<AttributeUsageAttribute(AttributeTargets.Parameter, Inherited := False)> _
Public NotInheritable Class OptionalAttribute _
Inherits Attribute
[ComVisibleAttribute(true)]
[AttributeUsageAttribute(AttributeTargets.Parameter, Inherited = false)]
public sealed class OptionalAttribute : Attribute
The OptionalAttribute type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
.gif "Public method") |
OptionalAttribute | Initializes a new instance of the OptionalAttribute class with default values. |
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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.) |
.gif "Protected method") |
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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Version Information
Silverlight
Supported in: 5, 4, 3
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.