QuerySaveFiles

Hi Experts,

I am developing visual studio extension . When ever  i press save button  , QuerySaveFile([InAttribute] uint rgfQuerySave, [InAttribute] int cFiles, [InAttribute] string[] rgpszMkDocuments, [InAttribute] uint[] rgrgf, [InAttribute] VSQEQS_FILE_ATTRIBUTE_DATA[] rgFileInfo, out uint pdwQSResult) is getting called  only  once for all files. But for the files with .cshtml files it is being called twice. i found this behavior in vs 2010. are there any reasons for this ?