//----------------------------------------------------------
public static string get_unit_length_type(Document doc)
{
string unit_length = "Millimeters";
try
{
Units units = doc.GetUnits();
List <UnitType> unit_types = UnitUtils.GetValidUnitTypes().ToList();
FormatOptions format_option = units.GetFormatOptions(unit_types.First(x => x == UnitType.UT_Length));
unit_length = LabelUtils.GetLabelFor(format_option.DisplayUnits);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return(unit_length);
}