Wrapping async code in transaction scope is not as straightforward as sync one. Let's say we have some simple code: await using (var connection = new SqlConnection(connectionString)) { await using var command = new SqlCommand("select 1", connection); await connection.OpenAsync(); await command.ExecuteScalarAsync(); } We can wrap it in transaction scope and test that it still works: using var ts = new TransactionScope(); await using (var connection = new SqlConnection(connectionString)) { await using var command = new SqlCommand("select 1", connection); await connection.OpenAsync(); await command.ExecuteScalarAsync(); } ts.Complete(); But if you try to run this code you will get: "A TransactionScope must be disposed on the same thread that it was created" exception. The fix is easy: we need to add TransactionScopeAsyncFlowOption.Enabled option to the constructor: var options = new TransactionOptions { IsolationLevel = IsolationLevel.ReadCom...