public Task UpdateUser(UserDataEntity user)
{
var deletedUser = _users.FirstOrDefault(u => u.Id == user.Id);
try
{
DeleteUser(user.Id);
AddUser(user);
}
catch (Exception)
{
if (!_users.Any(u => u.Id == deletedUser.Id))
{
AddUser(deletedUser);
}
throw;
}
return(Task.CompletedTask);
}