public class AbcController : Controller
{
   private readonly IMyService _myService;

   public AbcController(IMyService myService) {
     _myService = myService;
   }
}

public class MyController(IMyService _myService) : ControllerBase
{
   [HttpGet]
   public IActionResult RandomNumber()
   {
     var number = _myService.RandomNumber();

     _myService = null;

     var number2 = MyRandom();
     return Ok(number + number2);            
   }

   public int MyRandom()
   {
     return _myService.RandomNumber();
   }
}

if (!(context.SecurityToken is JsonWebToken accessToken) ||
    string.IsNullOrWhiteSpace(accessToken.UnsafeToString()) ||
    !await tokenStoreService.IsValidTokenAsync(accessToken.UnsafeToString(), userId))
{
    context.Fail("This token is not in our database.");
    return;
}

@model ProjectName.ViewModels.Identity.RegisterViewModel
<label asp-for="PhoneNumber"></label>

@using System.Reflection
@using System.Linq.Expressions
@using System.ComponentModel.DataAnnotations
@typeparam T
@if (ChildContent is null)
{
    <label>@Label</label>
}
else
{
    <label>
        @Label
        @ChildContent
    </label>
}
@code {

    [Parameter, EditorRequired]
    public Expression<Func<T>> DisplayNameFor { get; set; } = default!;

    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    private string Label => GetDisplayName();

    private string GetDisplayName()
    {
        var expression = (MemberExpression)DisplayNameFor.Body;
        var value = expression.Member.GetCustomAttribute(typeof(DisplayAttribute)) as DisplayAttribute;
        return value?.Name ?? expression.Member.Name;
    }
}

private LoginDto Login { get; } = new();

<CustomDisplayName DisplayNameFor="@(() => Login.UserName)" />

<CustomDisplayName DisplayNameFor="@(() => Login.UserName)">
    <span class="text-danger">(*)</span>
</CustomDisplayName>

@using System.Reflection
@using System.Linq.Expressions;
@using System.ComponentModel.DataAnnotations;
@typeparam T
@if (ChildContent == null)
{
    <label>@Label</label>
}
else
{
    <label>
        @Label
        @ChildContent
    </label>
}
@code {

    [Parameter]
    public Expression<Func<T>> DisplayNameFor { get; set; } = default!;

    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    [Inject]
    public IStringLocalizerFactory LocalizerFactory { get; set; } = default!;

    private string Label => GetDisplayName();

    private string GetDisplayName()
    {
        var expression = (MemberExpression)DisplayNameFor.Body;
        var displayAttribute = expression.Member.GetCustomAttribute(typeof(DisplayAttribute)) as DisplayAttribute;
        if (displayAttribute is {ResourceType: not null })
        {
            // Try to dynamically create an instance of the specified resource type
            var resourceType = displayAttribute.ResourceType;
            var localizer = LocalizerFactory.Create(resourceType);

            return localizer[displayAttribute.Name ?? expression.Member.Name];
        }
        return displayAttribute?.Name ?? expression.Member.Name;
    }
}

public class LoginDto
{
    [Display(Name = nameof(LoginDtoResource.UserName), ResourceType = typeof(LoginDtoResource))]
    [Required]
    [MaxLength(100)]
    public string UserName { get; set; } = default!;

    //...
}