public class SampleResxLocalizer : ITelerikStringLocalizer
{
    public string this[string name]
    {
        get
        {
            return GetStringFromResource(name);
        }
    }

    public string GetStringFromResource(string key)
    {
        // this will override only DropDownList_NoData message and it will return other messages as they are
        if (key == nameof(Messages.DropDownList_NoData))
        {
            return string.Empty;
        }

            return Messages.ResourceManager.GetString(key, Messages.Culture); ;
        }
}

builder.Services.AddSingleton(typeof(ITelerikStringLocalizer), typeof(SampleResxLocalizer));