private void ControlsToData()
{
if (_environmentalRequirements == null)
_environmentalRequirements = new EnvironmentalRequirements();
_environmentalRequirements.Operation = operationElements.EnvironmentalElements;
_environmentalRequirements.StorageTransport = storageElements.EnvironmentalElements;
if (_environmentalRequirements.Operation == null && _environmentalRequirements.StorageTransport == null)
_environmentalRequirements = null;
}