How do you preserve whitespaces in a Blazor application?

From .NET 5 Preview 7, Blazor components trim insignificant whitespaces to achieve better performance. This has been implemented as a result of the finding that 40% of the rendering time is consumed by whitespace nodes. If whitespace node removal causes unexpected behavior, you can simply enable it by using the @preservewhitespace directive.

@using System.Linq

@preservewhitespace true
 
<ul>
    @foreach (var item in forecasts)
    {
        <li>
            Temperature: @item.TemperatureC
        </li>
    }
</ul>
 
@code {
    private WeatherForecast[] forecasts;
 
    protected override void OnInitialized()
    {
        forecasts = Enumerable.Range(1, 10).Select(x => new WeatherForecast()
        {
            TemperatureC = x
        }).ToArray();
    }
 
    public class WeatherForecast
    {

        public int TemperatureC { get; set; }
 
    }
}