Visio Drawing (.vsdx) represents Microsoft Visio file format introduced from Microsoft Office 2013 onwards. It was developed to replace the binary file format, .VSD, which is supported by earlier versions of Microsoft Visio.
Learn more about this file format here
GroupDocs.Viewer (in GroupDocs.Viewer.dll) Version: 20.7
public static readonly FileType VSDX
Public Shared ReadOnly VSDX As FileType
static initonly FileType^ VSDX
static val VSDX: FileType