Computer Graphics Metafile (.cgm) is a free, platform-independent, international standard metafile format for storing and exchanging of vector graphics (2D), raster graphics, and text. CGM uses object-oriented approach and many function provisions for image production.
Learn more about this file format here
GroupDocs.Viewer (in GroupDocs.Viewer.dll) Version: 21.9
public static readonly FileType CGM
Public Shared ReadOnly CGM As FileType
static initonly FileType^ CGM