public void LoadUser()
{
UserBL UserBL = new UserBL();
List<DO.User> UserList;
UserList = UserBL.GetUser();
if (UserList != null)
dgv_UserManagement.DataSource = UserList;
dgv_UserManagement.Columns["UserID"].Visible = false;
dgv_UserManagement.Columns["PassWord"].Visible = false;
dgv_UserManagement.Columns["Role"].Visible = false;
dgv_UserManagement.Columns["Sequence"].HeaderText = "STT";
dgv_UserManagement.Columns["UserName"].HeaderText = "Tên Tài khoản";
dgv_UserManagement.Columns["Sequence"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
}