Answer / kuldeep

for save as dialoge box use this code

Response.ClearContent();
//give file type
Response.ContentType = "video/.wmv";
Response.AddHeader("content-disposition", "attachment;
filename=download.wmv");
string filename1 = @"E:\xyz.wmv";
Response.TransmitFile(filename1);

but if you need to download file without user interaction
then please refer to this link
http://www.devarticles.com/c/a/ASP.NET/HTTP-File-Download-
Without-User-Interaction-Using-.NET/

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