Need Clarity with Idisposable

Yes, it will - eventually.

If you do not use Dispose on an object that implements IDisposable, then it will be called automatically by the framework when the Garbage Collector realizes it is no longer needed and starts to delete it.

NOTE: This is not the same time as the object drops out of scope! The Garbage Collector may not get round to your object for hours, days or even weeks. If you create any object that implements IDisposable, then you are responsible for disposing of the object correctly, or problems can be expected. A simple example is to open a file for reading and not dispose of the stream object. If your application later tries to write to the file, it will get "File in use by another application" because the stream still exists (although it has no references) and is holding the file until the GC removes it. Frustrating, and annoying!