optimize ReleaseTransaction

Author: Ahoo-Wang

src/SmartSql/DbSession/DefaultDbSession.cs

@@ -215,7 +215,6 @@ public void CommitTransaction()
                 }
 
                 Transaction.Commit();
-                ReleaseTransaction();
                 Committed?.Invoke(this, DbSessionEventArgs.None);
 
                 #endregion
@@ -227,6 +226,10 @@ public void CommitTransaction()
                 _diagnosticListener.WriteDbSessionCommitError(operationId, this, ex);
                 throw;
             }
+            finally
+            {
+                ReleaseTransaction();
+            }
         }
 
         public void RollbackTransaction()
@@ -255,7 +258,6 @@ public void RollbackTransaction()
                 }
 
                 Transaction.Rollback();
-                ReleaseTransaction();
                 Rollbacked?.Invoke(this, DbSessionEventArgs.None);
 
                 #endregion
@@ -267,6 +269,10 @@ public void RollbackTransaction()
                 _diagnosticListener.WriteDbSessionRollbackError(operationId, this, ex);
                 throw;
             }
+            finally
+            {
+                ReleaseTransaction();
+            }
         }
 
         private void ReleaseTransaction()