<%@ Page Language="c#" AutoEventWireup="true"%>
<%@ Import Namespace="System.IO" %>
<script language="c#" runat="server">
protected void Page_Load(object sender, EventArgs e)
{
    FileStream oFileStream;
    long lFileSize = 0;
    oFileStream = new FileStream(Server.MapPath("/010.gif"), FileMode.Open);
    lFileSize = oFileStream.Length;

    byte[] bBuffer = new byte[(int)lFileSize];
    oFileStream.Read(bBuffer, 0, (int)lFileSize);
    oFileStream.Close();
    Response.ClearContent();
    Response.ContentType = "image/gif";
    Response.BinaryWrite(bBuffer);
    oFileStream.Close();
    Response.End();
}
</script>