I am using the SourceSafe COM object (SourceSafeTypeLib) from C# to automate a SourceSafe recursive get (part of a larger build process). The recursive function is shown below. How do I ensure that all the COM objects created in the foreach loop get released correctly?

   /// <summary>
        /// Recursively gets files/projects from SourceSafe (this is a recursive function).
        /// </summary>
        /// <param name="vssItem">The VSSItem to get</param>
        private void GetChangedFiles(VSSItem vssItem)
        {

            //  'If the object is a file perform the diff,
            //  'If not, it is a project, so use recursion to go through it
            if(vssItem.Type == (int)VSSItemType.VSSITEM_FILE)
            {
                bool bDifferent = false; //file is different
                bool bNew = false; //file is new

                //Surround the diff in a try-catch block. If a file is new(doesn't exist on
                //the local filesystem) an error will be thrown.  Catch this error and record it
                //as a new file.
                try
                {
                    bDifferent = vssItem.get_IsDifferent(vssItem.LocalSpec);
                }
                catch
                {
                    //File doesn't exist
                    bDifferent = true;
                    bNew = true;
                }

                //If the File is different(or new), get it and log the message
                if(bDifferent)
                {
                    if(bNew)
                    {
                        clsLog.WriteLine("Getting " + vssItem.Spec);
                    }
                    else
                    {
                        clsLog.WriteLine("Replacing " + vssItem.Spec);
                    }

                    string strGetPath = vssItem.LocalSpec;
                    vssItem.Get(ref strGetPath, (int)VSSFlags.VSSFLAG_REPREPLACE);
                }

            }
            else //Item is a project, recurse through its sub items
            {
                foreach(VSSItem fileItem in vssItem.get_Items(false))
                {
                    GetChangedFiles(fileItem);
                }

            }

        }