Json.Serialization.JsonFormatter.ParseObject C# (CSharp) Method

        private object ParseObject(string JsonString, Type objType)
        {
            object rv = objType.GetConstructor(new Type[] {}).Invoke(new object[] {});

            int pos = 0;
            string fn = GetNextQuotedString(JsonString, ref pos);
            while (fn != string.Empty)
            {
                FieldInfo fi = objType.GetField(fn);
                if (fi.FieldType == typeof(string))
                {
                    string val = GetValueString(JsonString, ref pos); //GetNextQuotedString(JsonString, ref pos);
                    fi.SetValue(rv, val);
                }
                else
                {
                    if (fi.FieldType == typeof(int))
                    {
                        string val = GetValueString(JsonString, ref pos);
                        int i = (val == null) ? 0 : int.Parse(val);
                        fi.SetValue(rv, i);
                    }
                    else
                    {
                        if (fi.FieldType == typeof(float))
                        {
                            string val = GetValueString(JsonString, ref pos);
                            float f = (val == null) ? 0f : val.ToFloat();
                            fi.SetValue(rv, f);
                        }
                        else
                        {
                            if (fi.FieldType == typeof(double))
                            {
                                string val = GetNextQuotedString(JsonString, ref pos);
                                double d = (val == null) ? 0.0 : double.Parse(val);
                                fi.SetValue(rv, d);
                            }
                            else
                            {
                                if (fi.FieldType == typeof(Guid))
                                {
                                    string val = GetNextQuotedString(JsonString, ref pos);
                                    Guid uid = val.ToGuid();
                                    
                                    fi.SetValue(rv, uid);
                                }
                                else
                                {
                                    if (fi.FieldType == typeof(DateTime))
                                    {
                                        string val = GetValueString(JsonString, ref pos);
                                        if (val != null)
                                        {
                                            DateTime dt = val.ToDateTime();
                                            fi.SetValue(rv, dt);
                                        }
                                    }
                                    else
                                    {
                                        if (fi.FieldType == typeof(Hashtable))
                                        {
                                            Hashtable ht = new Hashtable();
                                            string key = GetNextQuotedString(JsonString, ref pos);
                                            while (key != string.Empty)
                                            {
                                                string val = GetNextQuotedString(JsonString, ref pos);
                                                ht.Add(key, val);
                                                key = GetNextQuotedString(JsonString, ref pos);
                                            }
                                            fi.SetValue(rv, ht);
                                            pos++;
                                        }
                                        else
                                        {
                                            if (fi.FieldType.IsArray)
                                            {
                                                throw new NotImplementedException("Array deserialization is not implemented yet.");
                                                // TODO: deserialize array
                                            }
                                            else // structures
                                            {
                                                string val = GetSubObject(JsonString, ref pos);
                                                object ov = ParseObject(val, fi.FieldType);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                fn = GetNextQuotedString(JsonString, ref pos);
            }

            return rv;
        }
    }