public static void Run()
{
// ExStart:1
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
Workbook workbook = new Workbook(dataDir + "Book1.xlsx");
// Accessing the first worksheet in the Excel file
Worksheet worksheet = workbook.Worksheets[0];
worksheet.Cells["A1"].GetStyle().IsLocked = true;
// Finally, Protect the sheet now.
worksheet.Protect(ProtectionType.All);
workbook.Save(dataDir + "output.xlsx");
// ExEnd:1
}
}