Motivation
It is very common to write code similar to the listing below when using resources that might throw exceptions in garbage-collected languages:
Resource resource = null; try { resource = getResource; // Attempt to acquire the resource. // Perform actions with the resource. ... } finally { if (resource != null) // Resource might not been acquired, or already freed resource.Dispose; }The try...finally construct is necessary for proper exception safety, since the finally block enables execution of cleanup logic regardless of if an exception is thrown or not in the try block.
One disadvantage of this approach is that it requires the programmer to explicitly add cleanup code in a finally block. This leads to code size bloat, and failure to do so will lead to resource leakage in the program.
Read more about this topic: Dispose Pattern
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