private void load_Database()
        {
            /* add content from database */
            IoDatastorage mydatastorage = new IoDatastorage();
            string        myInput       = mydatastorage.string_IoDataStorage_ReadDataFromStorage(Storage.s_PathTextfile);

            try
            {
                /* try to print data from data storage to the gui */
                DeleteContentFromAllTextboxes();
                WriteCalendarNameFromDatabaseToTextBoxes(SplitDataFromStorageName(myInput));
                WriteDateFromDatabaseToTextBoxes(SplitDataFromStorageDate(myInput));
            }
            catch (System.ArgumentOutOfRangeException outofRange)
            {
                System.Diagnostics.Debug.WriteLine(outofRange.Message);
            }
            catch (FileNotFoundException e)
            {
                this.richTextBox3.Text = "An error occured.";
                System.Diagnostics.Debug.WriteLine(e.Message);
            }

            return;
        }
        public void btn_Save_Click(object sender, EventArgs e)
        {
            /* Write content to Gui (1), into data storage (2) and check if date is today to write it to another text box (3). */

            IoDatastorage myModel  = new IoDatastorage();
            DateTime      dateTime = new DateTime();

            WriteContentIntoTextboxes();                                                                      /* 1 */

            myModel.int_IoDatastorage_WriteDataToStorage(FormalizeContentToString(), Storage.s_PathTextfile); /* 2 */

            if ((Storage.myLocalAlarm) && (0 != (DateTime.Compare(Storage.myLocalDate.Date, dateTime.Date)))) /* 3 */
            {
                WriteContentIntoEmptyRichTextBox();
            }

            return;
        }