title: The parameters dictionary contains a null entry"
body: <p>I have this issue that I can't seem to figure out. I am posting data to my controller. The controller declaration looks like this:</p>
  
  <pre><code>public ActionResult Create(string Title, string Description, string Payment, string Adress, string ZIP, float Longitude, float Latitude)
  </code></pre>
  
  <p>Using Fiddler, the posted data looks like this</p>
  
  <p><img src="https://i.stack.imgur.com/8gQz1.jpg" alt="Fiddler posted data"></p>
  
  <p>I get this error message when posting: </p>
  
  <blockquote>
    <p>The parameters dictionary contains a <code>null</code> entry for parameter 'Longitude' of non-nullable type 'System.Single' for method 'System.Web.Mvc.ActionResult Create(System.String, System.String, System.String, System.String, System.String, Single, Single)' in 'GjortWebRole.Controllers.MyController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
        Parameter name: parameters</p>
  </blockquote>