return the variable used for using inside the usin

Question

I am returning the variable I am creating in a using statement inside the using statement (sounds funny):

public DataTable foo ()
{
    using (DataTable properties = new DataTable())
    {
       // do something
       return properties;
    }
}

Will this Dispose the properties variable??

After doing this am still getting this Warning:

Warning 34 CA2000 : Microsoft.Reliability : In method 'test.test', call System.IDisposable.Dispose on object 'properties' before all references to it are out of scope.

Any Ideas?

Thanks

Answer 1

Yes, it will dispose it - and then return it. This is almost always a bad thing to do.

In fact for DataTable, Dispose almost never does anything (the exception being if it's remoted somewhere, IIRC) but it's still a generally bad idea. Normally you should regard disposed objects as being unusable.