Write a C# program that inputs an emergency authorization key and checks if it is valid.

Your program should work as follows:

• Input an authorization key from the user and store it in a suitable variable.
• If the authorization key entered is equal to ABORT_LAUNCH, display the message Sequence terminated.
• If the authorization key entered is not equal to ABORT_LAUNCH, display the message Access denied.

You should use meaningful variable name(s), correct syntax, and indentation in your answer.