public static HttpResponseMessage Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "myapi/{id}")]HttpRequestMessage req, string id, TraceWriter log,
              [DocumentDB("CosmosDB", "CosmosDBCollection", SqlQuery = "select * from c where c.id = {id}", ConnectionStringSetting = "CosmosDBConnection")]IEnumerable<dynamic> inputDocuments,
              [DocumentDB("CosmosDB", "CosmosDBCollection", ConnectionStringSetting = "CosmosDBConnection")]out dynamic outputDocument)

{
    var inputDoc = inputDocuments.FirstOrDefault();
    outputDocument = inputDoc;
    var response = new HttpResponseMessage()
    {
        StatusCode = HttpStatusCode.OK,
        Content = new StringContent(JsonConvert.SerializeObject(inputDoc), Encoding.UTF8, "application/json")
    };
    return response;
}