Levels

private void Getinfo_Level(Document document)
{
	StringBuilder levelInformation = new StringBuilder();
	int levelNumber = 0;
	FilteredElementCollector collector = new FilteredElementCollector(document);
	ICollection<Element> collection = collector.OfClass(typeof(Level)).ToElements();
	foreach (Element e in collection)
	{
		Level level = e as Level;
	
		if (null != level)
		{
			// keep track of number of levels
			levelNumber++;
		
			//get the name of the level
			levelInformation.Append("\nLevel Name: " + level.Name);

			//get the elevation of the level
			levelInformation.Append("\n\tElevation: " + level.Elevation);
		
			// get the project elevation of the level
			levelInformation.Append("\n\tProject Elevation: " + level.ProjectElevation);
		}
	}

	//number of total levels in current document
	levelInformation.Append("\n\n There are " + levelNumber + " levels in the document!");
	
	//show the level information in the messagebox
	TaskDialog.Show("Revit",levelInformation.ToString());
}

Level CreateLevel(Autodesk.Revit.Document document)
{
	// The elevation to apply to the new level
	double elevation = 20.0; 
	
	// Begin to create a level
	Level level = document.Create.NewLevel(elevation);
	if (null == level)
	{
		throw new Exception("Create a new level failed.");
	}
	
	// Change the level name
	level.Name = "New level";
	
	return level;
}