load department

public DataTable load_department()
{
    DataTable dt = new DataTable();
    sqlcon = new SqlConnection(con);
    sqlcon.Open();
    string sql = "select * from department";
    SqlCommand cmd = new SqlCommand(sql);
    cmd.CommandType = CommandType.Text;
    cmd.Connection = sqlcon;
    SqlDataAdapter sd = new SqlDataAdapter(cmd);
    sd.Fill(dt);
    return dt;
}