required validation MaskedTextBox kendo ui

This is basically used for kendo ui text-box required validation. The code sample as given below.

<div class="col-sm-8 col-md-6">                   

   @(Html.Kendo().MaskedTextBoxFor(model => model.Name)

        .Name("Name")

        .HtmlAttributes(new

         {                        

            required = "required"

         })

     )

    <span data-for='PhoneNumber' class='k-invalid-msg'></span>                 

</div>