The vector formats that GIS C#.NET Library can read or write include ESRI Shapefile, GeoJSON, TopoJSON, Keyhole Markup Language, GPS Exchange Format, OpenStreetMap (OSM) XML and supports file formats like .Shp, .shx, .dbf, .geojson, .gdb, .gml, .kml, .mif, .osm....shp, .shx, .dbf, .qix, .cpg GeoJSON...