asp.net mvc: why is Html.CheckBox generating an additional hidden input

Question

I just noticed that Html.CheckBox(\"foo\") generates 2 inputs instead of one, anybody knows why is this so ?

Answer 1

As of 2020/11 and .NET 5 being in preview, there is a pull request that should make this behavior controllable. Thank you guys!

Anyway if someone founds it useful, .NET Core 3.0 port of Alexander Trofimov's answer:

public static IHtmlContent CheckBoxSimple(this IHtmlHelper htmlHelper, string name)
{
    TextWriter writer = new StringWriter();

    IHtmlContent html = htmlHelper.CheckBox(name);
    html.WriteTo(writer, HtmlEncoder.Default);

    string checkBoxWithHidden = writer.ToString();

    string pureCheckBox = checkBoxWithHidden.Substring(0, checkBoxWithHidden.IndexOf("