LicenseProvider Class


Provides the abstract base class for implementing a license provider.

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


<HostProtectionAttribute(SecurityAction.LinkDemand, SharedState := True)>
Public MustInherit Class LicenseProvider


Initializes a new instance of the LicenseProvider class.


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetLicense(LicenseContext, Type, Object, Boolean)

When overridden in a derived class, gets a license for an instance or type of component, when given a context and whether the denial of a license throws an exception.


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


Creates a shallow copy of the current Object.(Inherited from Object.)


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

Notes to Inheritors:

When you inherit from LicenseProvider, you must override the GetLicense method.

See LicFileLicenseProvider for an implementation of this class. For more information on licensing, see How to: License Components and Controls.

The following code example creates a licensed control using the Validate method. It uses a LicenseProvider that is implemented by the LicFileLicenseProvider class.

Imports System
Imports System.ComponentModel
Imports System.Windows.Forms

' Adds the LicenseProviderAttribute to the control.
<LicenseProvider(GetType(LicFileLicenseProvider))> _
Public Class MyControl
    Inherits Control

    ' Creates a new, null license.
    Private license As License = Nothing    

    Public Sub New()        

        ' Adds Validate to the control's constructor.
        license = LicenseManager.Validate(GetType(MyControl), Me)

        ' Insert code to perform other instance creation tasks here.

    End Sub

    Protected Overrides Sub Dispose(ByVal disposing As Boolean)

        If disposing Then
            If (license IsNot Nothing) Then
                license = Nothing
            End If
        End If

    End Sub    

End Class

.NET Framework
Available since 1.1

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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