title: Kendo UI: Get MultiSelect selected values as a comma separated string
body: <p>I'd appreciate if someone could help with my issue.
  I have an entity with field <code>PAYMENT_CURRENCIES</code> of <code>string</code> type, that should store comma separated values, i.e. "USD,EUR,AED" (or any other separation char).
  In my View:</p>
  
  <pre><code> @Html.Kendo().MultiSelectFor(model =&gt; model.Contract.PAYMENT_CURRENCIES).BindTo(context.Currencies).DataTextField("CODE").DataValueField("CODE").Placeholder("Add currency...")
  </code></pre>
  
  <p>The problem is when I submit the form i receive only first selected value in the <code>Controller</code>.
  I would not like to change the datatype of the field for <code>IEnumerable</code>.</p>
  
  <p>Is there a way to receive all selected values as a string with some separator?</p>
  
  <p>Thanks a lot</p>