Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/Common/DbTransaction.cs

@@ -0,0 +1,51 @@
+//------------------------------------------------------------------------------
+// <copyright file="DbTransaction.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Data.Common {
+
+    using System;
+    using System.Data;
+
+    public abstract class DbTransaction : MarshalByRefObject, IDbTransaction { // V1.2.3300
+        protected DbTransaction() : base() {
+        }
+
+        public DbConnection Connection {
+            get {
+                return DbConnection;
+            }
+        }
+
+        IDbConnection IDbTransaction.Connection {
+            get {
+                return DbConnection;
+            }
+        }
+
+        abstract protected DbConnection DbConnection {
+            get;
+        }
+
+        abstract public IsolationLevel IsolationLevel {
+            get;
+        }
+
+        abstract public void Commit();
+
+        public void Dispose() {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing) {
+        }
+
+        abstract public void Rollback();
+
+    }
+
+}