How to Pass DataTable As a parameter in stored Procedure

DataTable dt = new DataTable();
     TextBox txtdat = (TextBox)GVHolidays.Rows[e.RowIndex].Cells[1].Controls[1];
     TextBox txtreason = (TextBox)GVHolidays.Rows[e.RowIndex].Cells[3].Controls[1];
     //int st = Convert.ToInt32(GVHolidays.DataKeys[e.RowIndex].Values[0].ToString());
     objHRPL.status = Convert.ToInt32(GVHolidays.DataKeys[e.RowIndex].Values[1].ToString());
     objHRPL.username = Session["username"].ToString();
     //objHRPL.sno = st;

     IFormatProvider provider1 = new System.Globalization.CultureInfo("en-CA", true);
     String dob = txtdat.Text.Trim().ToString();
     DateTime datedob = DateTime.Parse(dob, provider1, System.Globalization.DateTimeStyles.NoCurrentDateDefault);
     objHRPL.dob = datedob;

     objHRPL.remarks = txtreason.Text.ToString();