Line 263 of FilteredStream is throwing an exception because jsonTweet is null.
```
var tweetObject = _jsSerializer.Deserialize<Dictionary<string, object>>(jsonTweet);
if (!String.IsNullOrEmpty(jsonTweet))
{
```
Shouldn't this be inside the if statement?
```
var tweetObject = _jsSerializer.Deserialize<Dictionary<string, object>>(jsonTweet);
if (!String.IsNullOrEmpty(jsonTweet))
{
```
Shouldn't this be inside the if statement?