ユーザーコントロールを貼り付けた場合のActiveControlについて

public class UserControl1 : System.Windows.Forms.Label
{
    private System.Windows.Forms.TextBox textBox1;

    public UserControl1()
    {
        InitializeComponent();
    }

    private void InitializeComponent()
    {
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.SuspendLayout();
        // 
        // textBox1
        // 
        this.textBox1.Location = new System.Drawing.Point(0, 0);
        this.textBox1.Name = "textBox1";
        this.textBox1.Size = new System.Drawing.Size(56, 19);
        this.textBox1.TabIndex = 0;
        // 
        // UserControl1
        // 
        this.Name = "UserControl1";
        this.Controls.Add(this.textBox1);
        this.Size = new System.Drawing.Size(136, 112);
        this.ResumeLayout(false);
    }
}

public Control ActiveControl
{
    get
    {
        if (this.Parent.GetType() == System.Type.GetType("UserControl"))
            return this.Parent;
        else
            return this;
    }
}