Listing 7 A component that displays a visible message when used in evaluation mode

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

[LicenseProvider(typeof(EvaluationLicenseProvider))]
public class TryAndBuyComponent : UserControl
{
    private Label evaluationLabel;

    private void InitializeComponent()
    {
        this.evaluationLabel = new System.Windows.Forms.Label();
        this.evaluationLabel.Text = "Evaluation Mode";
        this.Controls.Add( this.evaluationLabel );
    }

    public TryAndBuyComponent()
    {
        CustomLicense license;

        InitializeComponent();

        license = (CustomLicense) LicenseManager.Validate( 
            typeof(TryAndBuyComponent), this );

        if ( license.IsEvaluation ) evaluationLabel.Visible = true;
        else                        evaluationLabel.Visible = false;

        license.Dispose();
    }
}