Additional object for a ConcurrentBag?

Question

What is the meaning of this code snippet:

ConcurrentBag<UserModel> _userStore;

public Task UpdateUser(UserModel userModel) <br>
{ 
   _userStore = new ConcurrentBag<UserModel>(_userStore.Where(u => u.Email != userModel.Email)); 
   return Task.CompletedTask;
}

What does the statement { usermodel }?

Answer 1

This initializes the ConcurrentBag with one item.

It is equivalent to:

_userStore = new ConcurrentBag(_userStore.Where(u => u.Email != userModel.Email));
_userStore.Add(userModel);