Excelの選択してるCellとる

GetSelectedCell.cs

using Excel = Microsoft.Office.Interop.Excel;

# ...
		public List<string> GetSelectedItems() {
			Excel.Range range = Globals.ThisAddIn.Application.Selection as Excel.Range;

			List<string> cells = new List<string>();

			foreach (string cell in range.Value)
			{
				cells.Add(cell);
			}
			return cells;
		}