public void WriteHeader(DL_Writer dw) { dw.Comment(string.Concat("dxflib ", DL_Codes.DL_VERSION)); dw.SectionHeader(); dw.DxfString(9, "$ACADVER"); switch (_version) { case DL_Codes.dxfversion.AC1009: dw.DxfString(1, "AC1009"); break; case DL_Codes.dxfversion.AC1012: dw.DxfString(1, "AC1012"); break; case DL_Codes.dxfversion.AC1014: dw.DxfString(1, "AC1014"); break; case DL_Codes.dxfversion.AC1015: dw.DxfString(1, "AC1015"); break; case DL_Codes.dxfversion.AC1027: dw.DxfString(1, "AC1027"); break; default: break; } }