How to support async methods in a TransactionScope with Microsoft.Bcl.Async in .NET 4.0? [duplicate]

Answer 1

It is not possible to achieve this in .NET Framework 4.0. Additionally, .NET Framework 4.0 reached end of life on 2016-01-12, and thus is no longer relevant.

To support transaction scope in async methods in .NET going forward (since .NET Framework 4.5.1), use TransactionScopeAsyncFlowOption.Enabled

public static TransactionScope CreateAsyncTransactionScope(IsolationLevel isolationLevel = IsolationLevel.ReadCommitted)
    {
        var transactionOptions = new TransactionOptions
        {
            IsolationLevel = isolationLevel,
            Timeout = TransactionManager.MaximumTimeout
        };
        return new TransactionScope(TransactionScopeOption.Required, transactionOptions, TransactionScopeAsyncFlowOption.Enabled);
    }