Change Excel sheet grid line color in C#, VB.NET.

using Syncfusion.XlsIO;

Imports Syncfusion.XlsIO

// Initialize ExcelEngine.
using (ExcelEngine excelEngine = new ExcelEngine())
{
    // Initialize Application.
    IApplication application = excelEngine.Excel;
 
    // Set default version for application.
    application.DefaultVersion = ExcelVersion.Excel2013;
 
    // Create a new workbook.
    IWorkbook workbook = application.Workbooks.Create(1);
 
    // Access the first worksheet in the workbook.
    IWorksheet worksheet = workbook.Worksheets[0];
 
    // Add text to a cell
    worksheet.Range["A1:D5"].Text = "Hello World";
 
    // Set the Gridline color
    worksheet.GridLineColor = ExcelKnownColors.Red;
 
    // Save the workbook to csv format.
    workbook.SaveAs("Sample.xlsx");
}

'Initialize ExcelEngine.
Using excelEngine As ExcelEngine = New ExcelEngine
 
    'Initialize Application.
    Dim application As IApplication = excelEngine.Excel
 
    'Set default version for application.
    application.DefaultVersion = ExcelVersion.Excel2013
 
    'Create a new workbook.
    Dim workbook As IWorkbook = application.Workbooks.Create(1)
 
    'Access the first worksheet in the workbook.
    Dim worksheet As IWorksheet = workbook.Worksheets(0)
 
    'Add text to a cell
    worksheet.Range("A1:D5").Text = "Hello World"
 
    ’Set the Gridline color
    worksheet.GridLineColor = ExcelKnownColors.Red
 
    'Save the workbook to csv format.
    worksheet.SaveAs("Sample.csv", ",")
 
End Using