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public class GenericHandler : IHttpHandler { public class ASSystem { public string SID { get; set; } public string Description { get; set; } public string SystemName { get; set; } } public class ErrorObj { public string ErrorMessage { get; set; } } public void ProcessRequest(HttpContext context) { HttpContext.Current.Response.ContentType = "application/json"; HttpContext.Current.Response.ContentEncoding = Encoding.UTF8; string query = HttpContext.Current.Request.QueryString["SID"]; SOFAEntities ctx = new SOFAEntities(); JavaScriptSerializer serializer = new JavaScriptSerializer(); try { AS_SYSTEM system = ctx.AS_SYSTEM.Where(s => s.SYSTEM_ID == query).First() as AS_SYSTEM; if (system != null) { ASSystem sys = new ASSystem() { SID = system.SYSTEM_ID, Description = system.DESCRIPTION, SystemName = system.SYSTEM_NAME }; HttpContext.Current.Response.Write(serializer.Serialize(sys)); } } catch (Exception e) { HttpContext.Current.Response.Write(serializer.Serialize(new ErrorObj() { ErrorMessage = e.Message })); } } public bool IsReusable { get { return false; } } } This works, but when i try with HttpContext.Current.Response.Write(serializer.Serialize(system)); i get the following error: A circular reference was detected while serializing an object of type 'System.Data.Metadata.Edm.AssociationType What i wanted was a json object representating the complete as_system object, so i dont have to map each property manually. Is there any way to solve this? Thanks!

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