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ProvidePropertyAttribute Class

Specifies the name of the property that an implementer of IExtenderProvider offers to other components. This class cannot be inherited


Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = true)]
public sealed class ProvidePropertyAttribute : Attribute

The ProvidePropertyAttribute type exposes the following members.

Public methodProvidePropertyAttribute(String, String)Initializes a new instance of the ProvidePropertyAttribute class with the name of the property and the type of its receiver.
Public methodProvidePropertyAttribute(String, Type)Initializes a new instance of the ProvidePropertyAttribute class with the name of the property and its Type.

Public propertyPropertyNameGets the name of a property that this class provides.
Public propertyReceiverTypeNameGets the name of the data type this property can extend.
Public propertyTypeIdGets a unique identifier for this attribute. (Overrides Attribute.TypeId.)

Public methodEqualsReturns whether the value of the given object is equal to the current ProvidePropertyAttribute. (Overrides Attribute.Equals(Object).)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeReturns the hash code for this instance. (Overrides Attribute.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)

When you mark a class with this attribute, you tell the code generator to create an extender property with the name you provide. The marked class must implement IExtenderProvider. As a result, the new property can be used by other components in a container.

Within the marked class, you must implement Get <name> and Set <name> methods. For example, if you mark a class with [ProvideProperty("PropertyName")], you must implement GetPropertyName and SetPropertyName methods. To specify that the new property will be an extender property, you must implement from IExtenderProvider, you must also implement a CanExtend method.

For more information, see Extending Metadata Using Attributes.

The following example marks MyClass with a ProvidePropertyAttribute that tells the compiler to create a property called MyProperty from the GetMyProperty and SetMyProperty methods.

[ProvideProperty("MyProperty", typeof(Control))]
public class MyClass : IExtenderProvider {
    protected CultureInfo ciMine = null;
    // Provides the Get portion of MyProperty. 
    public CultureInfo GetMyProperty(Control myControl) {
        // Insert code here.
        return ciMine;

    // Provides the Set portion of MyProperty.
    public void SetMyProperty(Control myControl, string value) {
        // Insert code here.

    /* When you inherit from IExtenderProvider, you must implement the 
     * CanExtend method. */
    public bool CanExtend(Object target) {
        return(target is Control);

    // Insert additional code here.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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