New Post: Identifying that a command has finished (ShellStream)

Suppose I'm using ShellStream in the following way:

shellStream.Write("./interactive_command.sh\n"); // Command, that will ask me to prompt something
shellStream.Write("my first string\n");  // My first response to the prompt
shellStream.Write("my second string\n"); // My second response to the prompt

How do I know that the command './interactive_command.sh' has finished working and I can dispose ShellStream?
By the way, the command './interactive_command.sh' awaits the response silently, that is without any asking strings.