How to initialize an ASP.NET user control property ?

First way by render event and viewstate:

public partial class Test1 : System.Web.UI.UserControl
{

    public string CurrentValue
    {
        get { return (string)ViewState["CurrentValue"] ?? string.Empty; }
        set { ViewState["CurrentValue"] = value; }
    }

    protected override void Render(HtmlTextWriter writer)
    {
        base.Render(writer);

        writer.Write(this.CurrentValue);
    }

}

Second way by HiddenField:

        public int CurrentValue

        {

            get

            {

                return int.Parse(this.HiddenField1.Value.ToString());

            }

            set

            {

                this.HiddenField1.Value = value.ToString();

            }

        }

Render Method:

http://msdn.microsoft.com/en-us/library/system.web.ui.control.render.aspx