Possible null reference return.

Possible null reference return.

Nullable value type may be null.

'IsValidOp.IsSelfTouchingRingFormingHoleValid' is obsolete: 'Use SelfTouchingRingFormingHoleValid'

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'xCoordinate' in 'TerrainObjectWasImportedFromCrab.TerrainObjectWasImportedFromCrab(CrabTerrainObjectId terrainObjectId, CrabIdentifierTerrainObject identifierTerrainObject, CrabTerrainObjectNatureCode terrainObjectNatureCode, CrabCoordinate xCoordinate, CrabCoordinate yCoordinate, CrabBuildingNature buildingNature, CrabLifetime crabLifetime, CrabTimestamp timestamp, CrabOperator @operator, CrabModification? modification, CrabOrganisation? organisation)'.

Possible null reference argument for parameter 'yCoordinate' in 'TerrainObjectWasImportedFromCrab.TerrainObjectWasImportedFromCrab(CrabTerrainObjectId terrainObjectId, CrabIdentifierTerrainObject identifierTerrainObject, CrabTerrainObjectNatureCode terrainObjectNatureCode, CrabCoordinate xCoordinate, CrabCoordinate yCoordinate, CrabBuildingNature buildingNature, CrabLifetime crabLifetime, CrabTimestamp timestamp, CrabOperator @operator, CrabModification? modification, CrabOrganisation? organisation)'.

Possible null reference argument for parameter 'validGeometry' in 'bool Building.IsGeometryValid(ExtendedWkbGeometry validGeometry)'.

Possible null reference argument for parameter 'obj1' in 'bool ValueObject<BuildingGeometry>.operator !=(ValueObject<BuildingGeometry> obj1, ValueObject<BuildingGeometry> obj2)'.