The `ExcelWorksheet.Dimension` property exposes an address that indicates the area of the worksheet that contains cell values, formulas or styling. See example below:

```csharp
using var package = new ExcelPackage();
var sheet = package.Workbook.Worksheets.Add("Sheet 1");
sheet.Cells["A1"].Value = 1;
sheet.Cells["A2"].Value = 2;
sheet.Cells["A3"].Value = 3;
sheet.Cells["B1"].Value = 4;
sheet.Cells["B2"].Value = 5;
sheet.Cells["B3"].Value = 6;
Console.WriteLine($"Dimension address: {sheet.Dimension.Address}");
Console.WriteLine($"Dimension from row: {sheet.Dimension.Start.Row}");
Console.WriteLine($"Dimension to row: {sheet.Dimension.End.Row}");
Console.WriteLine($"Dimension from column: {sheet.Dimension.Start.Column}");
Console.WriteLine($"Dimension to column: {sheet.Dimension.End.Column}");
```

```vbnet
Using package As New ExcelPackage()
    Dim sheet = package.Workbook.Worksheets.Add("Sheet 1")
    sheet.Cells("A1").Value = 1
    sheet.Cells("A2").Value = 2
    sheet.Cells("A3").Value = 3
    sheet.Cells("B1").Value = 4
    sheet.Cells("B2").Value = 5
    sheet.Cells("B3").Value = 6
    Console.WriteLine($"Dimension address: {sheet.Dimension.Address}")
    Console.WriteLine($"Dimension from row: {sheet.Dimension.Start.Row}")
    Console.WriteLine($"Dimension to row: {sheet.Dimension.End.Row}")
    Console.WriteLine($"Dimension from column: {sheet.Dimension.Start.Column}")
    Console.WriteLine($"Dimension to column: {sheet.Dimension.End.Column}")
End Using
```

This code will result in the following output:

```text
Dimension address: A1:B3
Dimension from row: 1
Dimension to row: 3
Dimension from column: 1
Dimension to column: 2
```

### Getting the worksheet dimensions for values only

If you want to know the first or last value or the dimension for the worksheets cells having values, your can use the properties `FirstValueCell`, `LastValueCell` and `DimensionByValue` exposed by the `ExcelWorksheet` class.