Returns an object that represents a sheet.
| Name | Type | Description |
| nameOrIndex | string | number | Sheet name or sheet index. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetSheet("Sheet1");
oWorksheet.GetRange("A1").SetValue("This is a sample text on 'Sheet1'.");
builder.SaveFile("xlsx", "GetSheet.xlsx");
builder.CloseFile();