I'm having an issue where the RadGrid ExportToExcel() method is generating output that includes a header item "<meta http-equiv="Content-Type" content="text/html; charset=utf-8">" in addition to the the header also showing a content-Type of "application/vnd.ms-excel (found via chrome dev tools or fiddler). Our security scanning software is returning an error saying Multiple content types are specified. Is there a way to get rid of the <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> content that is output in the response?