public Dictionary<string, List<string>> List(string server, string instance)
        {
            DbSnapshotMgr mgr = new DbSnapshotMgr();
            DbConnectionInfo connectionInfo = new DbConnectionInfo(server, instance);

            return mgr.ListSnapshots(connectionInfo);
        }
            public void ListSnapshot()
            {
                DbSnapshotMgr target = new DbSnapshotMgr();
                DbConnectionInfo connectionInfo = new DbConnectionInfo(@".\", "SQL2012");

                var result = target.ListSnapshots(connectionInfo);
                Assert.IsTrue(result.Count > 0);
            }