title: OData + EF. Writing geography types
body: <p>I have an Odata service which exposes an EF6 code first model. Some of these entities include DbGeography fields. I can GET these field, despite the DbGeography fields having quite an ugly serialized format, but I cannot figure out how to POST or PUT an entity to the service. The DbGeography type seems to struggle with deserialization. </p>
  
  <p>Can anyone provide an example or link for how to do this?</p>