Index: System.Data.SQLite/SQLiteTransaction.cs
==================================================================
--- System.Data.SQLite/SQLiteTransaction.cs
+++ System.Data.SQLite/SQLiteTransaction.cs
@@ -21,12 +21,22 @@
     {
         /// <summary>
         /// The connection to which this transaction is bound
         /// </summary>
         internal SQLiteConnection _cnn;
-        internal int _version; // Matches the version of the connection
+
+        /// <summary>
+        /// Matches the version of the connection.
+        /// </summary>
+        private int _version;
+
+        /// <summary>
+        /// The isolation level for this transaction.
+        /// </summary>
         private IsolationLevel _level;
+
+        ///////////////////////////////////////////////////////////////////////////////////////////////
 
         /// <summary>
         /// Constructs the transaction object, binding it to the supplied connection
         /// </summary>
         /// <param name="connection">The connection to open a transaction on</param>
@@ -226,11 +236,11 @@
         /// optionally re-throwing any caught exception.
         /// </summary>
         /// <param name="throwError">
         /// Non-zero to re-throw caught exceptions.
         /// </param>
-        internal void IssueRollback(bool throwError)
+        private void IssueRollback(bool throwError)
         {
             SQLiteConnection cnn = Interlocked.Exchange(ref _cnn, null);
 
             if (cnn != null)
             {
@@ -302,11 +312,11 @@
         /// Non-zero to throw an exception if a state inconsistency is found.
         /// </param>
         /// <returns>
         /// Non-zero if this transaction is valid; otherwise, false.
         /// </returns>
-        internal bool IsValid(bool throwError)
+        private bool IsValid(bool throwError)
         {
             if (_cnn == null)
             {
                 if (throwError == true) throw new ArgumentNullException("No connection associated with this transaction");
                 else return false;