improve razor codes

[drma-tech]

1-ShouldRender
its necessary to track changes do enable it or not

protected override bool ShouldRender()
{
return _hasChanges;
}

2 - no delegates
<button @OnClick="() => Delete(item)">
Delete

use method:
<button @OnClick="DeleteCurrent">

3 - no objects as a parameter. but maybe record. search about it.

4 - avoid heave logic
@foreach(var user in Users
.Where(...)
.OrderBy(...)
.Take(50))
{
}

change to:
private IReadOnlyList visibleUsers;
visibleUsers = Users
.Where(...)
.OrderBy(...)
.Take(50)
.ToList();

5 - avoid string on properties:
class="@($"user-{Id}")"

change to:
private string cssClass;

protected override void OnParametersSet()
{
cssClass = $"user-{Id}";
}