GIS C#.NET Library or API supports formats Shapefile, GeoJSON, Filegdb, GML, KML, SVG, PostGis, Sql Server, GeoTIFF. It can read, write, convert and visualize vector data, manipulate geometries, perform analysis and lookup spatial reference systems by SRID....convert between GIS file formats, create and analyze feature geometries...GeoJSON ESRI File Geodatabase (FileGDB) Geography Markup Language...