New Post: Get ShellStream to respond to multiple nested prompts

The problem is I want to use the ShellStream to change a user's password:

user@linux:~$ passwd
>current UNIX password:
>Enter new UNIX password:
>Retype new UNIX password:
user@linux:~$

The ShellStream cannot intercept all the "> prompts" using an ExpectAction(). The only thing I've been able to do is respond to exactly one prompt but it hangs after that.

stream.Expect(
                            new ExpectAction("password for user1:", (s) =>
                            {
                                Console.Write(s);
                                writer.WriteLine("pass");
                            })
                        );

stream.Expect(
                                new ExpectAction("user1@hostname:~$", (s) =>
                                {
                                    Console.Write(s);
                                })
                            );

writer.Write( *** NEXT COMMAND HERE ***);

How do I intercept all three prompts above and answer them?