Asp.Net Web API Error: The 'ObjectContent`1' type failed to serialize the response body for content type 'application/xml; charset=utf-8'

Question

Simplest example of this, I get a collection and try to output it via Web API:

// GET api/items
public IEnumerable Get()
{
    return MyContext.I         


        

Answer 1

This helped me:
Add the following code in Application_Start function of Global.asax.cs

GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings
    .ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
GlobalConfiguration.Configuration.Formatters
    .Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);