Question

I have a try catch and finally block like this.

Client client = new Client();
try {
   ...
}
catch {
   ...
}
finally {
   client = null;
}

I would like to ask if client = null is necessary to wipe out memory use for client object if exception occurs.

Answer 1

Whenever an object has no references to it for any reason then it becomes eligible for garbage collection, including if a variable goes out of scope as a result of the program leaving a function or statement block. In other words, no.