public static void AddSheetToSpreadSheet(bool init = false)
        {
            SpreadSheet SpreadSheetObject = new SpreadSheet();

            Program.SpreadSheet_ObjectList.Add(SpreadSheetObject);
            SpreadSheet.AddRowsAndColumsToSheetInSpreadSheet(SpreadSheetObject);

            if (!init)
            {
                ToolsScreen.MakeEmptyLines(2);
                ToolsInput.GetUserInput(out Program.SpreadSheet_ObjectList[Program.SpreadSheet_ObjectList.Count - 1].SheetNameInSpreadSheet, "Indtast ønsket navn for Sheet " + (Program.SpreadSheet_ObjectList.Count - 1) + " : ");
            }
            else
            {
                Program.SpreadSheet_ObjectList[Program.SpreadSheet_ObjectList.Count - 1].SheetNameInSpreadSheet = Const.DefaultNameForFirstSheet;
            }
        }