Officeopenxml memorystream.writeto(response.outputstream) working on one page and not working on another

See more:

C#

Visual-Studio

ASP.NET4

I am using Visual Studio with C# in ASPX pages. WebApplication.
I am using OfficeOpenXml for writing the Excel file.

I have written the following code to write the excel file.

Response.Clear();
Response.Buffer = true;
Response.Charset = "";
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment; filename=StateList_" + DateTime.Now.ToString("yyyyMMyyHHmmss") + ".xlsx");
var myMS = new MemoryStream();
excel.SaveAs(myMS);
myMS.WriteTo(Response.OutputStream);
Response.Flush();
HttpContext.Current.ApplicationInstance.CompleteRequest();
Response.End();


Also I have added VerifyRenderingInServerForm event.

This code is working on one page and it is not working on another. Can any one help what i might have done wrong.

What I have tried:

I have also tried another option as follows:
string mydocpath = System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
DirectoryInfo outputDir = new DirectoryInfo(mydocpath);

FileInfo excelFile = new FileInfo(outputDir.FullName + @"\StateList_" + DateTime.Now.ToString("yyyyMMyyHHmmss") + ".xlsx");

excel.SaveAs(excelFile);

This code is working and creating the file on the server side. I need the file saving on the client side irrespective of OS.