Get Previous page Viewstate from this Page

Page1.aspx :

void btn_Click(object sender, EventArgs e)

{

  ViewState["Test"] = "Ajay";

  Server.Transfer("Page2.aspx");           

}

public string ReturnViewState()

{

  return ViewState["Test"].ToString();

}

Page2.aspx :

protected void Page_Load(object sender, EventArgs e)

{

  if (PreviousPage != null && PreviousPageViewState != null)

  {

    string str = PreviousPageViewState; //value will bw Ajay

  }

}

private string PreviousPageViewState

{

  get

  {

    string returnValue = null;

    if (PreviousPage != null)

    {

      Object objPreviousPage = (Object)PreviousPage;

      MethodInfo objMethod = objPreviousPage.GetType().GetMethod("ReturnViewState");

      //System.Reflection class

      return (String)objMethod.Invoke(objPreviousPage, null);

    }

    return returnValue;

  }

}