Please address the comments from this code review:
## Individual Comments

### Comment 1
<location> `src/BootstrapBlazor.Server/Components/Samples/OpcDa.razor.cs:47` </location>
<code_context>

     private void OnRead()
     {
-        var values = OpcDaServer.Read(Tag1, Tag2);
</code_context>

<issue_to_address>
Consider using dictionaries and TryGetValue to simplify tag lookups and reduce code nesting.

Here’s a way to keep exactly the same behavior but reduce both LOC and nesting by:

1. Turning your read/update lists into a `Dictionary<string, object?>` (via `ToDictionary`)  
2. Looking up each tag just once with `TryGetValue`  
3. Reverting the browse method back to a simple `ToList()` instead of the range‐operator hack.

---

**OnRead →**

```csharp
private void OnRead()
{
    var values = OpcDaServer
        .Read(Tag1, Tag2)
        .ToDictionary(item => item.Name, item => item.Value);

    if (values.TryGetValue(Tag1, out var raw1) && raw1 != null)
        _tagValue1 = raw1.ToString();

    if (values.TryGetValue(Tag2, out var raw2)
        && raw2 is int i2)
    {
        _tagValue2 = (i2 / 100d).ToString(CultureInfo.InvariantCulture);
    }
}
```

**UpdateValues →**

```csharp
private void UpdateValues(List<OpcReadItem> items)
{
    var values = items.ToDictionary(item => item.Name, item => item.Value);

    if (values.TryGetValue(Tag3, out var raw3) && raw3 != null)
        _tagValue3 = raw3.ToString();

    if (values.TryGetValue(Tag4, out var raw4)
        && raw4 is int i4)
    {
        _tagValue4 = (i4 / 100d).ToString(CultureInfo.InvariantCulture);
    }

    InvokeAsync(StateHasChanged);
}
```

**OnBrowse →**

```csharp
private void OnBrowse()
{
    _roots = OpcDaServer
        .Browse("", new OpcBrowseFilters(), out _)
        .Select(e => new TreeViewItem<OpcBrowseElement>(e)
        {
            Text        = e.Name,
            HasChildren = e.HasChildren,
            Icon        = "fa-solid fa-fw fa-cubes"
        })
        .ToList();
}
```

This keeps all behavior (including your `/100d` scaling) but avoids repeated LINQ searches, null‐check pods and the confusing new range operator.
</issue_to_address>