Response.BinaryWrite in IE8 and IE12 browser

[JasonHuang8888]

In the asp.net, I have the following codes:

Response.Buffer = true;
Response.Charset = "";
Response.Clear();
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.AppendHeader("Content-Disposition", "attachment;filename=" + strFileName);
Response.BufferOutput = true;
Response.AddHeader("Content-Length", iB.ToString());
Response.BinaryWrite(ByteAry);
Response.End();

When running on the broser IE12 and chrome, user can read the pdf with no problem.
But if running on the IE8, then the pdf just wont come out.
How do I fix this problem?
Thanks for help.

Jason

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