The TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY structure contains a 64-bit bitmap key to be sent back to the server.
file:///C:/ts_dev/TestSuites/MS-RDPBCGR/TestSuite/Src/TD/latest_XMLS_16may/RDPBCGR/ _rfc_ms-rdpbcgr2_1_1_17_1_1.xml
        /// <summary>
        /// Parse TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY
        /// (parser index is updated according to parsed length)
        /// </summary>
        /// <param name="data">data to be parsed</param>
        /// <param name="currentIndex">current parser index</param>
        /// <returns>TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY</returns>
        private TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY ParseEntry(byte[] data, ref int currentIndex)
        {
            TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY entry = new TS_BITMAPCACHE_PERSISTENT_LIST_ENTRY();
            entry.Key1 = ParseUInt32(data, ref currentIndex, false);
            entry.Key2 = ParseUInt32(data, ref currentIndex, false);

            return entry;
        }