Error in Retrieving Binary Image using generic Handler

public class Handler : IHttpHandler
{
static DataTable dt;
string url = ConfigurationManager.AppSettings["ServiceUrl"].ToString();

public void ProcessRequest(HttpContext context)
{
string id = context.Request.QueryString["id"];
if (id != null)
{

MemoryStream memoryStream = new MemoryStream();

string json = class.HttpGet(url + "Services/Product.svc/ProductByRowID/" + id);
json = Regex.Unescape(json);
dt = (DataTable)JsonConvert.DeserializeObject(json.Trim(new Char[] { ' ', '"', '.' }), typeof(DataTable));

//Get Image Data

byte[] file = (byte[])Convert.FromBase64String(dt.Rows[0]["ProductImage"].ToString());
context.Response.ContentType = "image/jpg";
context.Response.OutputStream.Write(file, 78, file.Length - 78);

memoryStream.Write(file, 0, file.Length);
context.Response.Buffer = true;
context.Response.BinaryWrite(file);
context.Response.Flush();
context.ApplicationInstance.CompleteRequest();
memoryStream.Dispose();



}
}




public bool IsReusable
{
get
{
return false;
}
}