How to send XML file to client in ASP.NET MVC

How to send XML file to client in ASP.NET MVC

In an ASP.NET MVC I have a database table. I want to have a button on some view page, if some user clicks that button I my application will generate XML file containing all rows in the database. Then the file containing XML should be sent to the client so that the user will see a download pop-up window.

Similarly I want to allow user to upload an XML file whose content will be added to the database.

What's the simplest way to let the user upload and download file ?

Thanks for all the answers

EDIT: This is my approach:

public FileContentResult Download() {         if(model.Series.Count() < 1) {             byte[] content = new byte[0];             return new FileContentResult(content, "Series");         }         XmlSerializer serializer = new XmlSerializer(model.Series.FirstOrDefault().GetType());          MemoryStream xmlStream = new MemoryStream();         foreach (Series s in model.Series) {             serializer.Serialize(xmlStream, s);         }          byte[] content2 = new byte[xmlStream.Length];         xmlStream.Position = 0;         xmlStream.Read(content2, 0, (int) xmlStream.Length);          return File(content2, "Series"); } 

Where model is DataContext. Howewer this does not work. When I try to download the data I get this error:

XML Parsing Error: junk after document element Location: http://localhost:1399/Xml/Download Line Number 7, Column 10:</Series><?xml version="1.0"?> ---------^ 

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An XML document must only have one top level element. jQuery DateTime pickerAfter the end of the element, you cannot have anything else. It looks like after the "</Series>" element you have "<?xml version="1.0>", which is invalid..

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