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// For complete examples and data files, please go to https://github.com/groupdocs-metadata/GroupDocs.Metadata-for-.NET
// initialize DwgFormat class
DwgFormat dwgFormat = new DwgFormat(Common.MapSourceFilePath(dwgFilePath));

// get metadata
CadMetadata metadata = dwgFormat.GetDwgMetadata();

// get width
int width = metadata.Width;

// get height
int height = metadata.Height;

// get header attribute
string[] attributes = metadata.HeaderAttributes;