# Adding Content to a Workbook

## Content



To create a new workbook and add values to the first ten cells, complete the following steps:

1.  Add a reference to C1.WPF.Excel.dll or C1.Silverlight.Excel.dll and create a **C1XLBook**.
    
    ```csharp
    // Create a new workbook to be saved
     C1XLBook book = new C1XLBook();
    ```
    
2.  Add values to the first ten cells.
    
    ```csharp
    // write content for the first ten cells
    XLSheet sheet = book.Sheets[0];
      for (int i = 0; i <= 9; i++)
       {
        sheet[i, 0].Value = i + 1;
       }
    ```
    
3.  Save and open the workbook. The code looks like the following.
    
    ```csharp
    // Save and open the file
    book.Save(@"C:\test.xls");
    System.Diagnostics.Process.Start(@"C:\test.xls");
    ```
    
    ![Excel File Output](https://cdn.mescius.io/document-site-files/images/4e8fb55a-cee4-4e5b-a6f1-f4ba4ccbfde1/c1excel_graphics/image11_2.png)