System.Data.SQLite

      }
#endif
#endif
      #endregion

      /////////////////////////////////////////////////////////////////////////

#if PLATFORM_COMPACTFRAMEWORK
    //
    // NOTE: On the .NET Compact Framework, the native interop assembly must
    //       be used because it provides several workarounds to .NET Compact
    //       Framework limitations important for proper operation of the core
    //       System.Data.SQLite functionality (e.g. being able to bind
    //       parameters and handle column values of types Int64 and Double).
    //
    internal const string SQLITE_DLL = "SQLite.Interop.083.dll";
#elif SQLITE_STANDARD
    //

    // NOTE: Otherwise, if the standard SQLite library is enabled, use it.
    //
    private const string SQLITE_DLL = "sqlite3";
#elif USE_INTEROP_DLL
    //
    // NOTE: Otherwise, if the native SQLite interop assembly is enabled,
    //       use it.
    //
    private const string SQLITE_DLL = "SQLite.Interop.dll";
#else
    //
    // NOTE: Finally, assume that the mixed-mode assembly is being used.
    //
    private const string SQLITE_DLL = "System.Data.SQLite.dll";
#endif

    // This section uses interop calls that also fetch text length to optimize conversion.  
    // When using the standard dll, we can replace these calls with normal sqlite calls and 
    // do unoptimized conversions instead afterwards
    #region interop added textlength calls

            foreach (long value in new long[] {
                    cnn2.LastInsertRowId, cnn2.MemoryUsed,
                    cnn2.MemoryHighwater
                })
            {
                // do nothing.
            }

            return;
        }

        throw new NotSupportedException("not a SQLite connection");
    }

    private int nextId = 0;
    private const int MAX_THREADS = 3;