LicFileLicenseProvider Class
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LicFileLicenseProvider Class


Provides an implementation of a LicenseProvider. The provider works in a similar fashion to the Microsoft .NET Framework standard licensing model.

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


[HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)]
public class LicFileLicenseProvider : LicenseProvider


Initializes a new instance of the LicFileLicenseProvider 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.)


Returns a key for the specified type.

System_CAPS_pubmethodGetLicense(LicenseContext, Type, Object, Boolean)

Returns a license for the instance of the component, if one is available.(Overrides LicenseProvider.GetLicense(LicenseContext, Type, Object, Boolean).)


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

System_CAPS_protmethodIsKeyValid(String, Type)

Determines whether the key that the GetLicense method retrieves is valid for the specified type.


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


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

The LicFileLicenseProvider offers GetLicense and IsKeyValid methods. The IsKeyValid method determines whether the LicenseKey retrieved by the GetLicense method is valid. When you inherit from this class, you can override the IsKeyValid method to provide your own validation logic.

This class exists to provide similar licensing functionality to COM licensing and uses text license files.

For more information on licensing, see How to: License Components and Controls.

The following example creates a licensed control using the Validate method. It uses LicFileLicenseProvider for the license manager.

using System;
using System.ComponentModel;
using System.Windows.Forms;

// Adds the LicenseProviderAttribute to the control.
public class MyControl : Control 

   // Creates a new, null license.
   private License license = null;

   public MyControl () 

      // Adds Validate to the control's constructor.
      license = LicenseManager.Validate(typeof(MyControl), this);

      // Insert code to perform other instance creation tasks here.

   protected override void Dispose(bool disposing) 
         if (license != null) 
            license = null;


.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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