Following this guide you will learn how to generate PDF, Word (DOC, DOCX), Excel(XLS, XLSX), PowerPoint(PPT, PPTX) documents thumbnails and preview document pages using GroupDocs.Merger for .NET API....GetPreview () { string filePath = @"c:\sample.xlsx" ; using ( Merger...GetPreview () { string filePath = @"c:\sample.xlsx" ; using ( Merger...