/// <summary>
/// Returns a list of worksheet-scope named ranges that the worksheet contains
/// </summary>
/// <param name="worksheetName">Name of the worksheet</param>
public IEnumerable <string> GetNamedRanges(string worksheetName)
{
if (String.IsNullOrEmpty(FileName))
{
throw new NullReferenceException("FileName property is not set");
}
return(ExcelUtilities.GetNamedRanges(FileName, worksheetName));
}