public static string A1_A1(this Range rngHome) { var start = rngHome.A1(); var end = rngHome.A1(rngHome.Rows.Count - 1, rngHome.Columns.Count - 1); return($"{start}:{end}"); }
public static string A1(this Range rngHome) { return(rngHome.A1(0, 0)); }