Accord.IO.ExcelReader.GetWorksheet C# (CSharp) Метод

        public DataSet GetWorksheet()
        {
            DataSet dataset = new DataSet("Excel Workbook");
            dataset.Locale = CultureInfo.InvariantCulture;

            foreach (string sheet in WorksheetNames)
            {
                DataTable table = GetWorksheet(sheet);
                dataset.Tables.Add(table);
            }

            return dataset;
        }

        private void MenuFileOpen_Click(object sender, EventArgs e)
        {
            if (openFileDialog.ShowDialog(this) == DialogResult.OK)
            {
                string filename = openFileDialog.FileName;
                string extension = Path.GetExtension(filename);
                if (extension == ".xls" || extension == ".xlsx")
                {
                    ExcelReader db = new ExcelReader(filename, true, false);
                    TableSelectDialog t = new TableSelectDialog(db.GetWorksheetList());

                    if (t.ShowDialog(this) == DialogResult.OK)
                    {
                        this.sourceTable = db.GetWorksheet(t.Selection);
                        this.dgvAnalysisSource.DataSource = sourceTable;

                        this.cbTimeName.Items.Clear();
                        this.cbEventName.Items.Clear();
                        this.checkedListBox1.Items.Clear();
                        foreach (DataColumn col in sourceTable.Columns)
                        {
                            this.cbTimeName.Items.Add(col.ColumnName);
                            this.cbEventName.Items.Add(col.ColumnName);
                            this.checkedListBox1.Items.Add(col.ColumnName);
                        }

                        this.cbTimeName.SelectedIndex = 0;
                    }
                }
            }
        }