asp.net mvc download file

Hi Im having trouble downloading files using asp.net mvc y ycode is quite straight forward and seems to work for pdf's only. It does not work for other filetypes

the code is below and the mime types I use for the documents are below.

return File(doc.filepath, mime, doc.title);

1. Microsoft Word .doc application/msword
2. Adobe Acrobat .pdf application/pdf
3. Microsoft Powerpoint .ppt application开发者_开发问答/mspowerpoint
4. Microsoft Excel .xls application/x-excel
5. Text File .txt application/msword

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try this:

    FilePathResult result = new FilePathResult(doc.filepath, mime);
    result.FileDownloadName = doc.title
    return result;