SharePoint Generic Webpart

public class BEATGenericWebPart : WebPart
{
    private string m_controlName;

    private string m_controlTemplatesPath;

    private string m_Folder;

    [Personalizable(PersonalizationScope.Shared)]
    [WebBrowsable(true)]
    [WebDisplayName("Name of User Control")]
    public string ControlName
    {
        get
        {
            return this.m_controlName;
        }
        set
        {
            this.m_controlName = value;
        }
    }

    [Personalizable(PersonalizationScope.Shared)]
    [WebBrowsable(true)]
    [WebDisplayName("Control Templates Path")]
    public string ControlTemplatesPath
    {
        get
        {
            return this.m_controlTemplatesPath;
        }
        set
        {
            this.m_controlTemplatesPath = value;
        }
    }

    [WebDisplayName("User Controls Folder")]
    [Personalizable(PersonalizationScope.Shared)]
    [WebBrowsable(true)]
    public string Folder
    {
        get
        {
            return this.m_Folder;
        }
        set
        {
            this.m_Folder = value;
        }
    }

    public BEATGenericWebPart()
    {
        this.m_controlTemplatesPath = string.Empty;
        this.m_Folder = string.Empty;
        this.m_controlName = string.Empty;
    }

    protected override void CreateChildControls()
    {
        try
        {
            string str = string.Format("{0}{1}{2}", this.m_controlTemplatesPath, this.m_Folder, this.m_controlName);
            Control control = this.Page.LoadControl(str);
            this.Controls.Add(control);
        }
        catch (Exception exception1)
        {
            Exception exception = exception1;
            Label label = new Label();
            label.Text = exception.Message;
            this.Controls.Add(label);
        }
    }

    protected override void RenderContents(HtmlTextWriter writer)
    {
        this.EnsureChildControls();
        base.RenderContents(writer);
    }
}