public void DeleteClient(int id)
{
Users.Remove(Users.Single(u => u.ID == id));
SaveUsers();
}
public void UpdateUser(User user)
{
Users[Users.IndexOf(Users.Single(u => u.ID == user.ID))] = user;
SaveUsers();
}
public User GetUser(int id)
{
return(Users.Single(u => u.ID == id));
}