[Solved] Error: Cannot convert type Telerik.WinControls.UI.GridViewDataColumn to System.Windows.Forms.DataGridViewColumn

it is showing me an error while I am using foreach loop

Error 1 Cannot convert type 'Telerik.WinControls.UI.GridViewDataColumn' to 'System.Windows.Forms.DataGridViewColumn' E:\myApp\myApp\Students\frmEditStudentList.cs 286 13 myApp

Last column contains checkbox to select the record for delete purpose. Now I want to export this data in Excel. for this i wrote the following code

private void tbExcel_Click(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    foreach (DataGridViewColumn column in dGVDep.Columns)
    {
        dt.Columns.Add(column.HeaderText, column.ValueType);
    }
    foreach (DataGridViewRow row in dGVDep.Rows)
    {
        dt.Rows.Add();
        foreach (DataGridViewCell cell in row.Cells)
        {
            dt.Rows[dt.Rows.Count - 1][cell.ColumnIndex] = cell.Value.ToString();
        }
    }
    string folderPath = @"C:\Reports\";
    if (!Directory.Exists(folderPath))
    {
        Directory.CreateDirectory(folderPath);
    }
 
    using (XLWorkbook wb = new XLWorkbook())
    {
        wb.Worksheets.Add(dt, "StudentList");
        wb.Worksheet(1).Cells("A1:C1").Style.Fill.BackgroundColor = XLColor.DarkGreen;
        for (int i = 1; i <= dt.Rows.Count; i++)
        {
            string cellRange = string.Format("A{0}:C{0}", i + 1);
            if (i % 2 != 0)
            {
                wb.Worksheet(1).Cells(cellRange).Style.Fill.BackgroundColor = XLColor.GreenYellow;
            }
            else
            {
                wb.Worksheet(1).Cells(cellRange).Style.Fill.BackgroundColor = XLColor.Yellow;
            }
        }               
        wb.Worksheet(1).Columns().AdjustToContents();
        wb.SaveAs(folderPath + "StudentList- " + DateTime.Now.ToShortDateString() + ".xlsx");
    }
    MessageBox.Show("Student Data Exported Successfully", "Alhamd Solution", MessageBoxButtons.OK, MessageBoxIcon.Information);*/
}