ViewModel = C#

public class ContactFormViewModel
{
    public string Name { get; set; }
    public string Email { get; set; }
    public void Submit()
    {
        ContactService.Submit(Name, Email);
    }
}

View = HTML

<div class="form-control">
   <dot:TextBox Text="{value: Name}" />
</div>
<div class="form-control">
   <dot:TextBox Text="{value: Email}" />
</div>
<div class="button-bar">
   <dot:Button Text="Submit" Click="{command: Submit()}" />
</div>

With DotVVM, you only need to write a viewmodel in C# and a view in HTML.
The rest is taken care of.