C#•2y ago

❔ Changing object property not limited to scope?

So here in UserManager there is a method:

public virtual async Task UpdateNormalizedUserNameAsync(TUser user)
    {
        var normalizedName = NormalizeName(await GetUserNameAsync(user).ConfigureAwait(false));
        normalizedName = ProtectPersonalData(normalizedName);
        await Store.SetNormalizedUserNameAsync(user, normalizedName, CancellationToken).ConfigureAwait(false);
    }

public virtual async Task UpdateNormalizedUserNameAsync(TUser user)
    {
        var normalizedName = NormalizeName(await GetUserNameAsync(user).ConfigureAwait(false));
        normalizedName = ProtectPersonalData(normalizedName);
        await Store.SetNormalizedUserNameAsync(user, normalizedName, CancellationToken).ConfigureAwait(false);
    }

And then in the Store.SetNormalizedUserNamyAsync method:

public virtual Task SetNormalizedUserNameAsync(TUser user, string? normalizedName, CancellationToken cancellationToken = default(CancellationToken))
    {
        cancellationToken.ThrowIfCancellationRequested();
        ThrowIfDisposed();
        if (user == null)
        {
            throw new ArgumentNullException(nameof(user));
        }
        user.NormalizedUserName = normalizedName;
        return Task.CompletedTask;
    }

public virtual Task SetNormalizedUserNameAsync(TUser user, string? normalizedName, CancellationToken cancellationToken = default(CancellationToken))
    {
        cancellationToken.ThrowIfCancellationRequested();
        ThrowIfDisposed();
        if (user == null)
        {
            throw new ArgumentNullException(nameof(user));
        }
        user.NormalizedUserName = normalizedName;
        return Task.CompletedTask;
    }

There is no ref keyword before TUser. So doesn't that mean setting the user.NormalizedUserName is useless since the change will not be affected by whatever calls it?

5 Replies

Angius•2y ago

Is TUser a reference type?

GameShark•2y ago

Wouldn't you have to use the ref keyword for it to be a reference type?

Angius•2y ago

No Classes and records are reference types Structs are value types

GameShark•2y ago

Huh. I always thought passing an object into aa method creates a copy of the obj. TIL. Thanks.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Changing object property not limited to scope?