是否有。net 4.0替代StreamReader.ReadLineAsync?

I'm stuck with .NET 4.0 on a project. StreamReader offers no Async or Begin/End version of ReadLine. The underlying Stream object has BeginRead/BeginEnd but these take a byte array so I'd have to implement the logic for reading line by line.I'm stuck with .NET 4.0 on a project. StreamRea