title: Type or Namespace name not found in Azure Functions
body: <p>I am trying to push some simulated data to azure iot hub and store the data received to iot hub in a mongo db using azure functions(C#). Receiveing iot hub messages up to azure functions is working. when I am trying to push them to mongo db as follows, it gives the following error.  I followed <a href="https://medium.com/@avirup171/azure-iot-hub-azure-function-azure-cosmos-db-walkthrough-cc30d12d1055" rel="nofollow noreferrer">this</a> tutorial while doing this.</p>
  
  <p><strong>my run.csx</strong></p>
  
  <pre><code>using System;
  using System.Runtime.Serialization;
  using System.ServiceModel.Description;
  using MongoDB.Bson.IO;
  using MongoDB.Bson;
  using MongoDB;
  using MongoDB.Driver;
  using System.Security.Authentication;
  using System.Text;
  using Newtonsoft.Json;
  using Newtonsoft.Json.Linq;
  
  public static void Run(string myIoTHubMessage, TraceWriter log)
  {
      log.Info($"C# IoT Hub trigger function processed a message: {myIoTHubMessage}");
      string deviceId="",data="";
      var raw_obj=JObject.Parse(myIoTHubMessage);
      deviceId=(string)raw_obj["device_id"];
      data=(string)raw_obj["Data"];
      Cosmos cosmos= new Cosmos(deviceId,data);
      cosmos.pushData();
  }
  
  //CosmosDB class
  public class Cosmos
  {
      string deviceId="",data="";
      public BsonDocument document = new BsonDocument();
      public Cosmos(string deviceId, string data)
      {
          this.deviceId=deviceId;
          this.data=data;
      }
      public void pushData()
      {
          MainAsync().Wait();
      }
      public async Task MainAsync()
      {
          string connectionString = 
      @"mongodb://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
      MongoClientSettings settings = MongoClientSettings.FromUrl(new MongoUrl(connectionString));
          settings.SslSettings = new SslSettings() { EnabledSslProtocols = SslProtocols.Tls12};
          var mongoClient = new MongoClient(settings);
          IMongoDatabase db = mongoClient.GetDatabase("iot");
          var icollection = db.GetCollection&lt;BsonDocument&gt;(deviceId);
          document.Add("Data",data);
          await icollection.InsertOneAsync(document);
      }
  
  }
  </code></pre>
  
  <p><strong>my project.json file</strong></p>
  
  <pre><code>{
    "frameworks": {
      "net46":{
        "dependencies": {
          "Newtonsoft.Json": "10.0.3",
          "System.ServiceModel.Primitives":"4.4.0",
          "MongoDB.Bson": "2.4.0",
          "MongoDB.Driver": "2.4.0",
          "MongoDB.Driver.Core": "2.4.0"
        }
      }
     }
  }
  </code></pre>
  
  <p>when I ran the code it gives following error</p>
  
  <pre><code>2018-10-10T18:34:25.990 [Error] Function compilation error
  2018-10-10T18:34:26.119 [Error] run.csx(3,27): error CS0234: The type or namespace name 'Description' does not exist in the namespace 'System.ServiceModel' (are you missing an assembly reference?)
  2018-10-10T18:34:26.242 [Error] run.csx(4,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.332 [Error] run.csx(5,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.435 [Error] run.csx(6,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.548 [Error] run.csx(7,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.666 [Error] run.csx(10,7): error CS0246: The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.771 [Error] run.csx(11,7): error CS0246: The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:26.828 [Warning] run.csx(13,48): warning CS0618: 'TraceWriter' is obsolete: 'Will be removed in an upcoming version. Use ILogger instead.'
  2018-10-10T18:34:26.946 [Error] run.csx(28,12): error CS0246: The type or namespace name 'BsonDocument' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:27.058 [Error] run.csx(17,17): error CS0103: The name 'JObject' does not exist in the current context
  2018-10-10T18:34:27.201 [Error] run.csx(28,40): error CS0246: The type or namespace name 'BsonDocument' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:27.304 [Error] run.csx(42,5): error CS0246: The type or namespace name 'MongoClientSettings' could not be found (are you missing a using directive or an assembly reference?)
  2018-10-10T18:34:27.431 [Error] run.csx(42,36): error CS0103: The name 'MongoClientSettings' does not exist in the current context
  2018-10-10T18:34:27.632 [Error] Executed 'Functions.EventHubTriggerCSharp1' (Failed, Id=32bc6c5d-73fa-4082-b74b-c86a901f6656)
  </code></pre>
  
  <p>Can someone help me to fix this issue?</p>