MongoDB.Driver.Document.Remove C# (CSharp) Method

        public void Remove(String key)
        {
            Dictionary.Remove(key);
            orderedKeys.Remove(key);
        }

 public void TestKeyOrderPreservedOnRemove()
 {
     Document d = new Document();
     d["one"] = 1;
     d["onepointfive"] = 1.5;
     d.Add("two", 2);
     d.Add("two.5", 2.5);
     d.Remove("two.5");
     d["three"] = 3;
     d.Remove("onepointfive");
     int cnt = 1;
     foreach(String key in d.Keys){
         Assert.AreEqual(cnt, d[key]);
         cnt++;
     }
 }